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Bisexuality is romantic attraction,
sexual attraction Sexual attraction is attraction on the basis of sexual desire or the quality of arousing such interest. Sexual attractiveness or sex appeal is an individual's ability to attract other people sexually, and is a factor in sexual selection or m ...
, or
sexual behavior Human sexual activity, human sexual practice or human sexual behaviour is the manner in which humans experience and express their sexuality. People engage in a variety of sexual acts, ranging from activities done alone (e.g., masturbation) t ...
toward both
male Male (Planet symbols, symbol: ♂) is the sex of an organism that produces the gamete (sex cell) known as sperm, which fuses with the larger female gamete, or Egg cell, ovum, in the process of fertilisation. A male organism cannot sexual repro ...
s and
female An organism's sex is female ( symbol: ♀) if it produces the ovum (egg cell), the type of gamete (sex cell) that fuses with the male gamete (sperm cell) during sexual reproduction. A female has larger gametes than a male. Females and ...
s. It may also be defined as the attraction to more than one
gender Gender is the range of social, psychological, cultural, and behavioral aspects of being a man (or boy), woman (or girl), or third gender. Although gender often corresponds to sex, a transgender person may identify with a gender other tha ...
, to people of both the same and different gender, or the attraction to people regardless of their sex or
gender identity Gender identity is the personal sense of one's own gender. Gender identity can correlate with a person's assigned sex or can differ from it. In most individuals, the various biological determinants of sex are congruent and consistent with the in ...
( ''pansexuality''). The term ''bisexuality'' is mainly used for people who experience both
heterosexual Heterosexuality is romantic attraction, sexual attraction, or sexual behavior between people of the opposite sex or gender. As a sexual orientation, heterosexuality is "an enduring pattern of emotional, romantic, and/or sexual attractions ...
and
homosexual Homosexuality is romantic attraction, sexual attraction, or sexual behavior between people of the same sex or gender. As a sexual orientation, homosexuality is "an enduring pattern of emotional, romantic, and/or sexual attractions" exc ...
attraction. Bisexuality is one of the three main classifications of
sexual orientation Sexual orientation is an enduring personal pattern of romantic attraction or sexual attraction (or a combination of these) to persons of the opposite sex or gender, the same sex or gender, or to both sexes or more than one gender. Patterns ar ...
along with heterosexuality and homosexuality, all of which exist on the
heterosexual–homosexual continuum Sexual orientation is an enduring personal pattern of Romance (love), romantic attraction or sexual attraction (or a combination of these) to persons of the opposite sex or gender, the same sex or gender, or to both sexes or more than one gender ...
. A bisexual identity does not necessarily equate to equal sexual attraction to both sexes; commonly, people who have a distinct but not exclusive sexual preference for one sex over the other also identify themselves as bisexual. Scientists do not know the exact determinants of sexual orientation, but they theorize that it is caused by a complex interplay of genetic,
hormonal A hormone (from the Greek participle , "setting in motion") is a class of signaling molecules in multicellular organisms that are sent to distant organs or tissues by complex biological processes to regulate physiology and behavior. Hormones a ...
, and environmental influences, and do not view it as a choice. Although no single theory on the cause of sexual orientation has yet gained widespread support, scientists favor biologically based theories. There is considerably more evidence supporting nonsocial, biological causes of sexual orientation than social ones, especially for males. Bisexuality has been observed in various human societies, as well as elsewhere in the animal kingdom, throughout
recorded history Recorded history or written history describes the historical events that have been recorded in a written form or other documented communication which are subsequently evaluated by historians using the historical method. For broader world h ...
. The term ''bisexuality'', like the terms ''hetero-'' and ''homosexuality'', was coined in the 19th century by
Charles Gilbert Chaddock Charles Gilbert Chaddock (November 14, 1861 – July 20, 1936) was an American neurologist, psychiatrist, and translator. He is remembered for describing the Chaddock reflex and is credited with introducing the terms '' bisexuality'', '' hete ...
.


Definitions


Sexual orientation, identity, and behavior

Bisexuality is variously defined as romantic or sexual attraction to both males and females, to more than one gender, or attraction to both people of the same gender and different genders. The
American Psychological Association The American Psychological Association (APA) is the main professional organization of psychologists in the United States, and the largest psychological association in the world. It has over 170,000 members, including scientists, educators, clin ...
states that "sexual orientation falls along a continuum. In other words, someone does not have to be exclusively homosexual or heterosexual, but can feel varying degrees of both. Sexual orientation develops across a person's lifetime–different people realize at different points in their lives that they are heterosexual, bisexual or homosexual." Attraction can take numerous forms for bisexuals, such as sexual, romantic, emotional, or physical.Sexual attraction, behavior, and identity may also be incongruent, as sexual attraction or behavior may not necessarily be consistent with identity. Some individuals identify themselves as heterosexual, homosexual, or bisexual without having had any sexual experience. Others have had homosexual experiences but do not consider themselves to be gay, lesbian, or bisexual. Likewise, self-identified gay or lesbian individuals may occasionally sexually interact with members of the opposite sex but do not identify as bisexual. The terms ''
queer ''Queer'' is an umbrella term for people who are non-heterosexual or non- cisgender. Originally meaning or , ''queer'' came to be used pejoratively against LGBTQ people in the late 19th century. From the late 1980s, queer activists began to ...
'', '' polysexual'', '' heteroflexible'', ''homoflexible,'' ''
men who have sex with men Men who have sex with men (MSM) are men who engage in sexual activity with other men, regardless of their sexual orientation or sexual identity. The term was created by epidemiologists in the 1990s, to better study and communicate the spre ...
'' and ''
women who have sex with women Women who have sex with women (WSW) are women who engage in sexual activities with women, whether they identify as straight, lesbian, bisexual, pansexual, have other sexualities, or dispense with sexual identification altogether. The term ''WSW ...
'' may also be used to describe sexual identity or identify sexual behavior. Some sources state that bisexuality encompasses romantic or sexual attraction to all
gender identities Gender identity is the personal sense of one's own gender. Gender identity can correlate with a person's assigned sex or can differ from it. In most individuals, the various biological determinants of sex are congruent and consistent with the i ...
or that it is romantic or sexual attraction to a person irrespective of that person's biological sex or gender, equating it to or rendering it interchangeable with
pansexuality Pansexuality is sexual, romantic, or emotional attraction towards people of all genders, or regardless of their sex or gender identity. Pansexual people may refer to themselves as gender-blind, asserting that gender and sex are not de ...
. The concept of pansexuality deliberately rejects the
gender binary The gender binary (also known as gender binarism) is the classification of gender into two distinct forms of masculine and feminine, whether by social system, Culture, cultural belief, or both simultaneously. Most cultures use a gender binary, ...
, the "notion of two genders and indeed of specific sexual orientations", as pansexual people are open to relationships with people who do not identify as strictly men or women. Sometimes the phrase '' bisexual umbrella'', or ''bisexual community'', is used to describe any non-monosexual behaviors, attractions, and identities, usually for purposes of
collective action Collective action refers to action taken together Advocacy group, by a group of people whose goal is to enhance their condition and achieve a common objective. It is a term that has formulations and theories in many areas of the social sciences ...
and challenging monosexist cultural assumptions. The term "bisexual community" includes those who identify as bisexual, pansexual/omnisexual, biromantic, polysexual, or sexually fluid. The bisexual activist Robyn Ochs defines bisexuality as "the potential to be attracted—romantically and/or sexually—to people of more than one sex and/or gender, not necessarily at the same time, not necessarily in the same way, and not necessarily to the same degree." According to Rosario, Schrimshaw, Hunter, Braun (2006): Bisexuality as a transitional identity has also been examined. In a
longitudinal study A longitudinal study (or longitudinal survey, or panel study) is a research design that involves repeated observations of the same variables (e.g., people) over long periods of time (i.e., uses longitudinal data). It is often a type of observationa ...
about sexual identity development among lesbian, gay, and bisexual (LGB) youths, Rosario et al. "found evidence of both considerable consistency and change in LGB sexual identity over time". Youths who had identified as both gay/lesbian and bisexual prior to baseline were approximately three times more likely to identify as gay/lesbian than as bisexual at subsequent assessments. Of youths who had identified only as bisexual at earlier assessments, 60 to 70 percent continued to thus identify, while approximately 30 to 40 percent assumed a gay/lesbian identity over time. Rosario et al. suggested that "although there were youths who consistently self-identified as bisexual throughout the study, for other youths, a bisexual identity served as a transitional identity to a subsequent gay/lesbian identity." By contrast, a longitudinal study by Lisa M. Diamond, which followed women identifying as lesbian, bisexual, or unlabeled, found that "more women adopted bisexual/unlabeled identities than relinquished these identities", over a ten-year period. The study also found that "bisexual/unlabeled women had stable overall distributions of same-sex/other-sex attractions". Diamond has also studied male bisexuality, noting that survey research found "almost as many men transitioned at some point from a gay identity to a bisexual, queer or unlabeled one, as did from a bisexual identity to a gay identity." There may also be a difference between sexual and romantic attractions in bisexuals over time. One study found that in the short term bisexual men and women were much more likely to change their sexual behavior than heterosexual or homosexual individuals. Bisexual men were less likely to have a change in romantic attraction but those that did were more likely to have a greater change than in sexual feelings while bisexual women were more likely than bisexual men to have a change in romantic attraction. This suggests that sexual and romantic attraction is not fixed for bisexual individuals and changes over time.


Kinsey scale

In the 1940s, the zoologist
Alfred Kinsey Alfred Charles Kinsey (; June 23, 1894 – August 25, 1956) was an American sexologist, biologist, and professor of entomology and zoology who, in 1947, founded the Institute for Sex Research at Indiana University, now known as the Kinsey Insti ...
created a scale to measure the continuum of sexual orientation from heterosexuality to homosexuality. Kinsey studied human sexuality and argued that people have the capability of being hetero- or homosexual even if this trait does not present itself in the current circumstances. The Kinsey scale is used to describe a person's sexual experience or response at a given time. It ranges from 0, meaning exclusively heterosexual, to 6, meaning exclusively homosexual. People who rank anywhere from 2 to 4 are often considered bisexual; they are often not fully one extreme or the other. The sociologists Martin S. Weinberg and Colin J. Williams write that, in principle, people who rank anywhere from one to five could be considered bisexual. Psychologist Jim McKnight writes that while the idea that bisexuality is a form of sexual orientation intermediate between homosexuality and heterosexuality is implicit in the Kinsey scale, that conception has been "severely challenged" since the publication of '' Homosexualities'' (1978), by Weinberg and the psychologist Alan P. Bell.


Criticism

The Kinsey scale is criticized for various reasons. One of the main reasons is the inverse relation in attraction to males and females that the Kinsey scale represents. The Kinsey scale says that having a higher level attraction to one gender results in less attraction to the other, which some studies do not support. This aspect of the Kinsey scale can impact the results of studies that utilize the scale, as there is a biological difference between bisexuals and gay people.


Other scales

* Klein Sexual Orientation Grid ** A more descriptive orientation grid that takes into account: Sexual attraction, sexual behavior, sexual fantasies, emotional preference, social preference, lifestyle preference, and self-identification. It also has different measures for certain variables and is not binary by design. * Shively Scale ** Measures physical and affectional attraction on two separate scales. * Sell Assessment of Sexual Orientation ** Measures sexual attraction, sexual orientation identity, and sexual behavior and reports the extent of all of those factors. * Multidimensional Scale of Sexuality (MSS) ** Uses nine categories to categorize bisexuality. These categories are evaluated on sexual behavior, sexual attraction, arousal to erotic material, emotional factors, and sexual dreams and fantasies. The combined answers to all of these questions make up the score.


Demographics and prevalence

Scientific estimates as to the prevalence of bisexuality have varied from 0.7 to 8 percent. ''The Janus Report on Sexual Behavior'', published in 1993, concluded that 5 percent of men and 3 percent of women considered themselves bisexual, while 4 percent of men and 2 percent of women considered themselves homosexual. A 2002 survey in the United States by the
National Center for Health Statistics The National Center for Health Statistics (NCHS) is a U.S. government agency that provides statistical information to guide actions and policies to improve the public health of the American people. It is a unit of the Centers for Disease Control ...
found that 1.8 percent of men ages 18–44 considered themselves bisexual, 2.3 percent homosexual, and 3.9 percent as "something else". The same study found that 2.8 percent of women ages 18–44 considered themselves bisexual, 1.3 percent homosexual, and 3.8 percent as "something else". In 2007, an article in the 'Health' section of ''The New York Times'' stated that "1.5 percent of American women and 1.7 percent of American men identify themselves sbisexual." Also in 2007, it was reported that 14.4 percent of young US women identified themselves as " not strictly heterosexual", with 5.6 percent of the men identifying as gay or bisexual. A study in the journal ''
Biological Psychology Behavioral neuroscience, also known as biological psychology, biopsychology, or psychobiology,Psychobi ...
'' in 2011 reported that there were men who identify themselves as ''bisexuals'' and who were aroused by both men and women. In the first large-scale government survey measuring Americans' sexual orientation, the NHIS reported in July 2014 that only 0.7 percent of Americans identify as bisexual. A collection of recent Western surveys finds that about 10% of women and 4% of men identify as mostly heterosexual, 1% of women and 0.5% of men as bisexual, and 0.4% of women and 0.5% of men as mostly homosexual. Across cultures, there is some variance in the prevalence of bisexual behavior, but there is no persuasive evidence that there is much variance in the rate of same-sex attraction. The
World Health Organization The World Health Organization (WHO) is a list of specialized agencies of the United Nations, specialized agency of the United Nations which coordinates responses to international public health issues and emergencies. It is headquartered in Gen ...
estimates a worldwide prevalence of
men who have sex with men Men who have sex with men (MSM) are men who engage in sexual activity with other men, regardless of their sexual orientation or sexual identity. The term was created by epidemiologists in the 1990s, to better study and communicate the spre ...
between 3 and 16%, many of whom have sex with women as well. A YouGov survey found that the proportion of young adults living in the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...
identifying as bisexual surged 14% from 2015 to 2019.


Studies, theories and social responses

There is no consensus among scientists about the exact reasons that an individual develops a heterosexual, bisexual or homosexual orientation. Although scientists favor biological models for the cause of sexual orientation, they do not believe that the development of sexual orientation is the result of any one factor. They generally believe that it is determined by a complex interplay of
biological Biology is the scientific study of life and living organisms. It is a broad natural science that encompasses a wide range of fields and unifying principles that explain the structure, function, growth, origin, evolution, and distribution of ...
and
environmental factors An environmental factor, ecological factor or eco factor is any factor, abiotic or biotic, that influences living organisms. Abiotic factors include ambient temperature, amount of sunlight, air, soil, water and pH of the water soil in which an ...
, and is shaped at an early age. There is considerably more evidence supporting nonsocial, biological causes of sexual orientation than social ones, especially for males. There is no substantive evidence which suggests parenting or early childhood experiences play a role with regard to sexual orientation. Most scientists do not believe that sexual orientation is a choice that can be changed at will. In 2000,
American Psychiatric Association The American Psychiatric Association (APA) is the main professional organization of psychiatrists and trainee psychiatrists in the United States, and the largest psychiatric organization in the world. It has more than 39,200 members who are in ...
stated: "To date there are no replicated scientific studies supporting any specific biological
etiology Etiology (; alternatively spelled aetiology or ætiology) is the study of causation or origination. The word is derived from the Greek word ''()'', meaning "giving a reason for" (). More completely, etiology is the study of the causes, origins ...
for homosexuality. Similarly, no specific psychosocial or family dynamic cause for homosexuality has been identified, including histories of childhood sexual abuse." Research into how sexual orientation may be determined by genetic or other prenatal factors plays a role in political and social debates about homosexuality, and also raises fears about genetic profiling and
prenatal testing Prenatal testing is a tool that can be used to detect some birth defects at various stages prior to birth. Prenatal testing consists of prenatal screening and prenatal diagnosis, which are aspects of prenatal care that focus on detecting problem ...
.
Magnus Hirschfeld Magnus Hirschfeld (14 May 1868 – 14 May 1935) was a German physician, Sexology, sexologist and LGBTQ advocate, whose German citizenship was later revoked by the Nazi government.David A. Gerstner, ''Routledge International Encyclopedia of Queer ...
argued that adult sexual orientation can be explained in terms of the bisexual nature of the developing fetus: he believed that in every embryo there is one rudimentary neutral center for attraction to males and another for attraction to females. In most fetuses, the center for attraction to the opposite sex developed while the center for attraction to the same sex regressed, but in fetuses that became homosexual, the reverse occurred. Simon LeVay has criticized Hirschfeld's theory of an early bisexual stage of development, calling it confusing; LeVay maintains that Hirschfeld failed to distinguish between saying that the brain is sexually undifferentiated at an early stage of development and saying that an individual actually experiences sexual attraction to both men and women. According to LeVay, Hirschfeld believed that in most bisexual people the strength of attraction to the same sex was relatively low, and that it was therefore possible to restrain its development in young people, something Hirschfeld supported. Hirschfeld created a ten-point scale to measure the strength of sexual desire, with the direction of desire being represented by the letters A (for heterosexuality), B (for homosexuality), and A + B (for bisexuality). On this scale, someone who was A3, B9 would be weakly attracted to the opposite sex and very strongly attracted to the same sex, an A0, B0 would be asexual, and an A10, B10 would be very attracted to both sexes. LeVay compares Hirschfeld's scale to that developed by Kinsey decades later.
Sigmund Freud Sigmund Freud ( ; ; born Sigismund Schlomo Freud; 6 May 1856 – 23 September 1939) was an Austrian neurologist and the founder of psychoanalysis, a clinical method for evaluating and treating psychopathology, pathologies seen as originating fro ...
, the founder of
psychoanalysis PsychoanalysisFrom Greek language, Greek: and is a set of theories and techniques of research to discover unconscious mind, unconscious processes and their influence on conscious mind, conscious thought, emotion and behaviour. Based on The Inte ...
, believed that every human being is bisexual in the sense of incorporating general attributes of both sexes. In his view, this was true anatomically and therefore also psychologically, with sexual attraction to both sexes being an aspect of this psychological bisexuality. Freud believed that in the course of sexual development the masculine side of this bisexual disposition would normally become dominant in men and the feminine side in women, but that all adults still have desires derived from both the masculine and the feminine sides of their natures. Freud did not claim that everyone is bisexual in the sense of feeling the same level of sexual attraction to men and women. Freud's belief in innate bisexuality was rejected by Sándor Radó in 1940 and, following Radó, by many later psychoanalysts. Radó argued that there is no biological bisexuality in humans. Alan P. Bell, Martin S. Weinberg, and Sue Kiefer Hammersmith reported in '' Sexual Preference'' (1981) that sexual preference was much less strongly connected with pre-adult sexual feelings among bisexuals than it was among heterosexuals and homosexuals. Based on this and other findings, they suggested that bisexuality is more influenced by social and sexual learning than is exclusive homosexuality. Letitia Anne Peplau et al. wrote that while Bell et al.'s view "sounds plausible, it has not been tested explicitly and seems at odds with available evidence". Human bisexuality has mainly been studied alongside homosexuality. Van Wyk and Geist argue that this is a problem for sexuality research because the few studies that have observed bisexuals separately have found that bisexuals are often different from both heterosexuals and homosexuals. Furthermore, bisexuality does not always represent a halfway point between the dichotomy. Research indicates that bisexuality is influenced by biological, cognitive and cultural variables in interaction, and this leads to different types of bisexuality. In the current debate around influences on sexual orientation, biological explanations have been questioned by social scientists, particularly by feminists who encourage women to make conscious decisions about their life and sexuality. A difference in attitude between homosexual men and women has also been reported, with men more likely to regard their sexuality as biological, "reflecting the universal male experience in this culture, not the complexities of the lesbian world." There is also evidence that women's sexuality may be more strongly affected by cultural and contextual factors. American academic
Camille Paglia Camille Anna Paglia ( ; born April 2, 1947) is an American academic, social critic and Feminism, feminist. Paglia was a professor at the University of the Arts (Philadelphia), University of the Arts in Philadelphia, Pennsylvania from 1984 until ...
has promoted bisexuality as an ideal. American Harvard professor
Marjorie Garber Marjorie Garber (born June 11, 1944) is an American professor at Harvard University and the author of a wide variety of books, most notably ones about William Shakespeare and aspects of popular culture including Human sexuality, sexuality. Biog ...
made an academic case for bisexuality with her 1995 book ''Vice Versa: Bisexuality and the Eroticism of Everyday Life,'' in which she argued that most people would be bisexual if not for repression and other factors such as lack of sexual opportunity.


Brain structure and chromosomes

LeVay's (1991) examination at autopsy of 18 homosexual men, 1 bisexual man, 16 presumably heterosexual men and 6 presumably heterosexual women found that the INAH 3 nucleus of the anterior
hypothalamus The hypothalamus (: hypothalami; ) is a small part of the vertebrate brain that contains a number of nucleus (neuroanatomy), nuclei with a variety of functions. One of the most important functions is to link the nervous system to the endocrin ...
of homosexual men was smaller than that of heterosexual men and closer in size of heterosexual women. Although grouped with homosexuals, the INAH 3 size of the one bisexual subject was similar to that of the heterosexual men. Some evidence supports the concept of biological precursors of bisexual orientation in genetic males. According to
John Money John William Money (8 July 1921 – 7 July 2006) was a New Zealand American psychologist, sexologist and professor at Johns Hopkins University known for his research on human sexual behavior and gender. Money advanced the use of more accur ...
(1988), genetic males with an extra Y chromosome are more likely to be bisexual,
paraphilic A paraphilia is an experience of recurring or intense sexual arousal to atypical objects, places, situations, fantasies, behaviors, or individuals. It has also been defined as a sexual interest in anything other than a legally consenting human ...
and impulsive.


Evolutionary theory

Some evolutionary psychologists have argued that same-sex attraction does not have adaptive value because it has no association with potential
reproductive success Reproductive success is an individual's production of offspring per breeding event or lifetime. This is not limited by the number of offspring produced by one individual, but also the reproductive success of these offspring themselves. Reproduct ...
. Instead, bisexuality can be due to normal variation in brain plasticity. More recently, it has been suggested that same-sex alliances may have helped males climb the social hierarchy giving access to females and reproductive opportunities. Same-sex allies could have helped females to move to the safer and resource richer center of the group, which increased their chances of raising their offspring successfully. Likewise, Barron and Hare suggest that same-sex attraction is a
spandrel A spandrel is a roughly triangular space, usually found in pairs, between the top of an arch and a rectangular frame, between the tops of two adjacent arches, or one of the four spaces between a circle within a square. They are frequently fil ...
of prosocial traits, which has been consistently selected among humans over time. These prosocial traits include social affiliation, communication, integration, as well as reduced reactive aggression among members of the same sex.
David Buss David Michael Buss (born April 14, 1953) is an American evolutionary psychologist at the University of Texas at Austin, researching human sex differences in mate selection. He is considered one of the founders of evolutionary psychology. Biog ...
criticized the alliance hypothesis, stating that there is no evidence that most young men in most cultures use sexual behavior to establish alliances; instead, the norm is for same-sex alliances to not be accompanied by any sexual activity. Additionally, he states that there is no evidence that men who engage in bisexual behavior do better than other men at forming alliances or ascending in status. Barron and Hare state that there are ethnographic examples of same-sex activity being used to strengthen social bonds among males and females. Brendan Zietsch of the Queensland Institute of Medical Research proposes the alternative theory that men exhibiting female traits become more attractive to females and are thus more likely to mate, provided the genes involved do not drive them to complete rejection of heterosexuality. Barron and Hare concur and argue that this is one of the reasons why bisexuality is more common than exclusive homosexuality among animal populations, including human populations. However, this is underreported due to enforced binary dichotomies in previous research and cultural factors. Also, in a 2008 study, its authors stated that "There is considerable evidence that human sexual orientation is genetically influenced, so it is not known how homosexuality, which tends to lower reproductive success, is maintained in the population at a relatively high frequency." They hypothesized that "while genes predisposing to homosexuality reduce homosexuals' reproductive success, they may confer some advantage in heterosexuals who carry them" and their results suggested that "genes predisposing to homosexuality may confer a mating advantage in heterosexuals, which could help explain the evolution and maintenance of homosexuality in the population." Barron and Hare say that this finding is only shown in Western European societies, with said finding being weakly supported in "other populations or cultures".


Masculinization

Masculinization Virilization or masculinization is the biological development of adult male characteristics in young males or females. Most of the changes of virilization are produced by androgens. Virilization is a medical term commonly used in three medical a ...
of women and hypermasculinization of men has been a central theme in sexual orientation research. There are several studies suggesting that bisexuals have a high degree of masculinization. LaTorre and Wendenberg (1983) found differing personality characteristics for bisexual, heterosexual and homosexual women. Bisexuals were found to have fewer personal insecurities than heterosexuals and homosexuals. This finding described bisexuals as self-assured and less likely to have mental instabilities. The confidence of a secure identity consistently translated to more masculinity than other subjects. This study did not explore societal norms, prejudices, or the feminization of homosexual males. In a research comparison, published in the ''Journal of the Association for Research in
Otolaryngology Otorhinolaryngology ( , abbreviated ORL and also known as otolaryngology, otolaryngology–head and neck surgery (ORL–H&N or OHNS), or ear, nose, and throat (ENT)) is a surgical subspecialty within medicine that deals with the surgical an ...
'', women usually have a better hearing sensitivity than males, assumed by researchers as a genetic disposition connected to child bearing. Homosexual and bisexual women have been found to have a hypersensitivity to sound in comparison to heterosexual women, suggesting a genetic disposition to not tolerate high pitched tones. While heterosexual, homosexual and bisexual men have been found to exhibit similar patterns of hearing, there was a notable differential in a sub-group of males identified as hyperfeminized homosexual males who exhibited test results similar to heterosexual women.


Prenatal hormones

The prenatal hormonal theory of sexual orientation suggests that people who are exposed to excess levels of sex hormones have masculinized brains and show increased homosexuality or bisexuality. Studies providing evidence for the masculinization of the brain have, however, not been conducted to date. Research on special conditions such as
congenital adrenal hyperplasia Congenital adrenal hyperplasia (CAH) is a group of Genetic disorder#Autosomal recessive, autosomal recessive disorders characterized by impaired cortisol synthesis. It results from the deficiency of one of the five enzymes required for the Biosy ...
(CAH) and exposure to
diethylstilbestrol Diethylstilbestrol (DES), also known as stilbestrol or stilboestrol, is a nonsteroidal estrogen medication, which is presently rarely used. In the past, it was widely used for a variety of indications, including pregnancy support for those with ...
(DES) indicate that prenatal exposure to, respectively, excess
testosterone Testosterone is the primary male sex hormone and androgen in Male, males. In humans, testosterone plays a key role in the development of Male reproductive system, male reproductive tissues such as testicles and prostate, as well as promoting se ...
and
estrogen Estrogen (also spelled oestrogen in British English; see spelling differences) is a category of sex hormone responsible for the development and regulation of the female reproductive system and secondary sex characteristics. There are three ...
s are associated with female–female sex fantasies in adults. Both effects are associated with bisexuality rather than homosexuality. There is research evidence that the digit
ratio In mathematics, a ratio () shows how many times one number contains another. For example, if there are eight oranges and six lemons in a bowl of fruit, then the ratio of oranges to lemons is eight to six (that is, 8:6, which is equivalent to the ...
of the length of the 2nd and 4th digits (index finger and ring finger) is somewhat negatively related to prenatal testosterone and positively to estrogen. Studies measuring the fingers found a statistically significant skew in the 2D:4D ratio (long ring finger) towards homosexuality with an even lower ratio in bisexuals. It is suggested that exposure to high prenatal testosterone and low prenatal estrogen concentrations is one cause of homosexuality whereas exposure to very high testosterone levels may be associated with bisexuality. Because testosterone in general is important for sexual differentiation, this view offers an alternative to the suggestion that male homosexuality is genetic. The prenatal hormonal theory suggests that a homosexual orientation results from exposure to excessive testosterone causing an over-masculinized brain. This is contradictory to another hypothesis that homosexual preferences may be due to a feminized brain in males. However, it has also been suggested that homosexuality may be due to high prenatal levels of unbound testosterone that results from a lack of receptors at particular brain sites. Therefore, the brain could be feminized while other features, such as the 2D:4D ratio could be over-masculinized.


Sex drive

Van Wyk and Geist summarized several studies comparing bisexuals with hetero- or homosexuals that have indicated that bisexuals have higher rates of sexual activity, fantasy, or erotic interest. These studies found that male and female bisexuals had more heterosexual fantasy than heterosexuals or homosexuals; that bisexual men had more sexual activities with women than did heterosexual men, and that they masturbated more but had fewer happy marriages than heterosexuals; that bisexual women had more orgasms per week and they described them as stronger than those of hetero- or homosexual women; and that bisexual women became heterosexually active earlier, masturbated and enjoyed masturbation more, and were more experienced in different types of heterosexual contact. Research suggests that, for most women, high sex drive is associated with increased sexual attraction to both women and men. For men, however, high sex drive is associated with increased attraction to one sex or the other, but not to both, depending on sexual orientation. Similarly for most bisexual women, high sex drive is associated with increased sexual attraction to both women and men; while for bisexual men, high sex drive is associated with increased attraction to one sex, and weakened attraction to the other.


Sociosexuality

Richard A. Lippa proposed that there exist two dimensions of sexual orientation: a gender typicality dimension, and a monosexuality dimension. With the gender typicality dimension being associated with the
heterosexual Heterosexuality is romantic attraction, sexual attraction, or sexual behavior between people of the opposite sex or gender. As a sexual orientation, heterosexuality is "an enduring pattern of emotional, romantic, and/or sexual attractions ...
-
homosexual Homosexuality is romantic attraction, sexual attraction, or sexual behavior between people of the same sex or gender. As a sexual orientation, homosexuality is "an enduring pattern of emotional, romantic, and/or sexual attractions" exc ...
distinction, while the
sociosexuality Sociosexuality, sometimes called sociosexual orientation, is the individual difference in the willingness to engage in sexual activity outside of a committed relationship. Individuals who are more ''restricted'' sociosexually are less willing to en ...
dimension has many behavioral effects. He proposes someone who would be at any point in the heterosexual-homosexual spectrum will become bisexual if they are high on the sociosexuality dimension. This dimension being associated with higher sociosexuality, higher
neuroticism Neuroticism is a personality trait associated with negative emotions. It is one of the Big Five traits. Individuals with high scores on neuroticism are more likely than average to experience such feelings as anxiety, worry, fear, anger, shame ...
, lower
agreeableness Agreeableness is the trait theory, personality trait of being kind, Sympathy, sympathetic, cooperative, warm, honest, straightforward, and considerate. In personality psychology, agreeableness is one of the Big Five personality traits, five major ...
, lower honesty-humility, higher
openness to experience Openness to experience is one of the domains which are used to describe personality psychology, human personality in the Big Five personality traits, Five Factor Model. Openness involves six Facet (psychology), facets, or dimensions: active imagina ...
, and a minor degree of
gender nonconformity Gender nonconformity or gender variance is gender expression by an individual whose behavior, mannerisms, and/or appearance does not match masculine or feminine gender norms. A person can be gender-nonconforming regardless of their gender ident ...
. He proposes this as explaining phenomena such as increased
juvenile delinquency Juvenile delinquency, also known as juvenile offending, is the act of participating in unlawful behavior younger than the statutory age of majority. These acts would be considered crimes if the individuals committing them were older. The term ...
among bisexuals, increased mental health issues and substance use disorder among bisexuals, and increased dark triad traits among bisexual women. Critics of this theory have described elements observed as coming from experiences of
biphobia Biphobia or monosexism is aversion toward bisexuality or people who are identified or perceived as being bisexual. Similarly to homophobia, it refers to hatred and prejudice specifically against those identified or perceived as being in the ...
, but Lippa counters that these phenomena are present even among heterosexual identifying people with some same sex attraction, who would likely be heterosexual passing.


Community


General social impacts

The bisexual community (also known as the bisexual/pansexual, bi/pan/fluid, or non-monosexual community) includes members of the
LGBTQ community The LGBTQ community (also known as the LGBT, LGBT+, LGBTQ+, LGBTQIA, LGBTQIA+, or queer community) comprises LGBTQ individuals united by a common culture and social movements. These communities generally celebrate pride, diversity, individu ...
who identify as bisexual, pansexual or fluid. Because some bisexual people do not feel that they fit into either the gay or the heterosexual world, and because they have a tendency to be "invisible" in public, some bisexual persons are committed to forming their own communities, culture, and political movements. Some who identify as bisexual may merge themselves into either homosexual or heterosexual society. Other bisexual people see this merging as enforced rather than voluntary; bisexual people can face exclusion from both homosexual and heterosexual society on coming out. Psychologist Beth Firestein states that bisexuals tend to internalize social tensions related to their choice of partners and feel pressured to label themselves as homosexuals instead of occupying the difficult middle ground where attraction to people of both sexes would defy society's value on monogamy. These social tensions and pressure may affect bisexuals' mental health, and specific therapy methods have been developed for bisexuals to address this concern. Bisexual behaviors are also associated in popular culture with men who engage in same-sex activity while otherwise presenting as heterosexual. The majority of such men — said to be ''living on the down-low'' — do not self-identify as bisexual. This may be a cultural misperception closely related to that of other LGBTQ individuals who hide their actual orientation due to societal pressures, a phenomenon colloquially called "being
closeted ''Closeted'' and ''in the closet'' are metaphors for LGBTQ people who have not disclosed their sexual orientation or gender identity and aspects thereof, including sexual identity and sexual behavior. This metaphor is associated and sometime ...
". In the U.S., a 2013 Pew survey showed that 28% of bisexuals said that "all or most of the important people in their life are aware that they are LGBT" vs. 77% of gay men and 71% of lesbians. Furthermore, when broken down by gender, only 12% of bisexual men said that they were "out" vs. 33% of bisexual women.


Perceptions and discrimination

Like people of other LGBTQ sexualities, bisexuals often face discrimination. In addition to the discrimination associated with
homophobia Homophobia encompasses a range of negative attitudes and feelings toward homosexuality or people who identify or are perceived as being lesbian, Gay men, gay or bisexual. It has been defined as contempt, prejudice, aversion, hatred, or ant ...
, bisexuals frequently contend with discrimination from gay men, lesbians, and straight society around the word ''bisexual'' and bisexual identity itself. The belief that everyone is bisexual (especially women as opposed to men), or that bisexuality does not exist as a unique identity, is common. This stems from two views: In the heterosexist view, people are presumed to be sexually attracted to the opposite sex, and it is sometimes reasoned that a bisexual person is simply a heterosexual person who is sexually experimenting. In the monosexist view, it is believed that people cannot be bisexual unless they are equally sexually attracted to both sexes, regulating sexual orientation to being about the sex or gender one prefers. In this view, people are either exclusively homosexual (gay/lesbian) or exclusively heterosexual (straight),
closeted ''Closeted'' and ''in the closet'' are metaphors for LGBTQ people who have not disclosed their sexual orientation or gender identity and aspects thereof, including sexual identity and sexual behavior. This metaphor is associated and sometime ...
homosexual people who wish to appear heterosexual, or heterosexuals who are experimenting with their sexuality. Assertions that one cannot be bisexual unless equally sexually attracted to both sexes, however, are disputed by various researchers, who have reported bisexuality to fall on a continuum, like sexuality in general. Male bisexuality is particularly presumed to be non-existent, with sexual fluidity studies adding to the debate. In 2005, researchers Gerulf Rieger, Meredith L. Chivers, and J. Michael Bailey used penile plethysmography to measure the arousal of self-identified bisexual men to
pornography Pornography (colloquially called porn or porno) is Sexual suggestiveness, sexually suggestive material, such as a picture, video, text, or audio, intended for sexual arousal. Made for consumption by adults, pornographic depictions have evolv ...
involving only men and pornography involving only women. Participants were recruited via advertisements in gay-oriented magazines and an alternative paper. They found that the self-identified bisexual men in their sample had genital arousal patterns similar to either homosexual or heterosexual men. The authors concluded that "in terms of behavior and identity, bisexual men clearly exist", but that male bisexuality had not been shown to exist with respect to arousal or attraction. Some researchers hold that the technique used in the study to measure genital arousal is too crude to capture the richness (erotic sensations, affection, admiration) that constitutes sexual attraction. The National Gay and Lesbian Task Force called the study and ''
The New York Times ''The New York Times'' (''NYT'') is an American daily newspaper based in New York City. ''The New York Times'' covers domestic, national, and international news, and publishes opinion pieces, investigative reports, and reviews. As one of ...
'' coverage of it flawed and biphobic. The American Institute of Bisexuality stated that Bailey's study was misinterpreted and misreported by both ''The New York Times'' and its critics. In 2011, Bailey and other researchers reported that among men with a history of several romantic and sexual relationships with members of both sexes, high levels of sexual arousal were found in response to both male and female sexual imagery. The subjects were recruited from a
Craigslist Craigslist (stylized as craigslist) is a privately held American company operating a classified advertisements website with sections devoted to jobs, housing, for sale, items wanted, services, community service, gigs, résumés, and discussi ...
group for men seeking intimacy with both members of a heterosexual couple. The authors said that this change in recruitment strategy was an important difference, but it may not have been a representative sample of bisexual-identified men. They concluded that "bisexual-identified men with bisexual arousal patterns do indeed exist", but could not establish whether such a pattern is typical of bisexual-identified men in general. Bisexual erasure (or bisexual invisibility) is the tendency to ignore, remove, falsify, or reexplain evidence of bisexuality in
culture Culture ( ) is a concept that encompasses the social behavior, institutions, and Social norm, norms found in human societies, as well as the knowledge, beliefs, arts, laws, Social norm, customs, capabilities, Attitude (psychology), attitudes ...
,
history History is the systematic study of the past, focusing primarily on the Human history, human past. As an academic discipline, it analyses and interprets evidence to construct narratives about what happened and explain why it happened. Some t ...
,
academia An academy (Attic Greek: Ἀκαδήμεια; Koine Greek Ἀκαδημία) is an institution of tertiary education. The name traces back to Plato's school of philosophy, founded approximately 386 BC at Akademia, a sanctuary of Athena, the go ...
,
news media The news media or news industry are forms of mass media that focus on delivering news to the general public. These include News agency, news agencies, newspapers, news magazines, News broadcasting, news channels etc. History Some of the fir ...
and other
primary source In the study of history as an academic discipline, a primary source (also called an original source) is an Artifact (archaeology), artifact, document, diary, manuscript, autobiography, recording, or any other source of information that was cre ...
s. In its most extreme form, bisexual erasure includes denying that bisexuality exists. It is often a manifestation of biphobia, although it does not necessarily involve overt antagonism. There is increasing inclusion and visibility of bisexuals, particularly in the LGBTQ community. American psychologist Beth Firestone writes that since she wrote her first book on bisexuality, in 1996, "bisexuality has gained visibility, although progress is uneven and awareness of bisexuality is still minimal or absent in many of the more remote regions of our country and internationally."


Symbols and observances

A common symbol of the bisexual community is the bisexual flag, designed by Michael Page and unveiled in 1998, which has a deep pink stripe at the top for homosexuality, a blue one on the bottom for heterosexuality, and a purple one – blending the pink and blue – in the middle to represent bisexuality. Another symbol with a similarly symbolic color scheme is the biangles symbol of bisexuality, a pair of overlapping pink and blue triangles, forming lavender where they intersect. This design is an expansion on the
pink triangle A pink triangle is a symbol for the LGBT community. Initially intended as a badge of shame, it was later reappropriated as a positive symbol of self-identity. It originated in Nazi Germany in the 1930s and 1940s as one of the Nazi concentratio ...
, a well-known symbol for the gay community. The biangles symbol was designed by artist Liz Nania as she co-organized a bisexual contingent for the
Second National March on Washington for Lesbian and Gay Rights The Second National March on Washington for Lesbian and Gay Rights was a large Demonstration (people), political rally that took place in Washington, D.C., on October 11, 1987. Around 750,000 people participated. Its success, size, scope, and hist ...
in 1987. However, some bisexual individuals object to the use of a pink triangle, as it was a symbol that
Adolf Hitler Adolf Hitler (20 April 1889 – 30 April 1945) was an Austrian-born German politician who was the dictator of Nazi Germany from 1933 until Death of Adolf Hitler, his suicide in 1945. Adolf Hitler's rise to power, He rose to power as the lea ...
's regime used to tag and persecute homosexuals. In response, a double crescent moon symbol was devised by Vivian Wagner in 1998. This symbol is common in Germany and surrounding countries. upright=0.7, Venus flanked by Venus and Mars symbols for a bisexual woman upright=0.7, Mars flanked by Venus and Mars symbols for a bisexual man
Celebrate Bisexuality Day Celebrate Bisexuality Day (also called Bisexual Pride Day, Bi Visibility Day, CBD, Bisexual Pride and Bi Visibility Day, and Bisexuality+ Day) is observed annually on September 23 to recognize and celebrate bisexual people, the bisexual commun ...
(also called Bisexual Pride Day, Bi Visibility Day, CBD, Bisexual Pride and Bi Visibility Day, and Bisexuality+ Day) is observed annually on September 23 to recognize and celebrate bisexual people, the bisexual community, and the history of bisexuality.


In BDSM

In Steve Lenius' original 2001 paper, he explored the acceptance of bisexuality in a supposedly pansexual
BDSM BDSM is a variety of often Eroticism, erotic practices or Sexual roleplay, roleplaying involving Bondage (BDSM), bondage, Discipline (BDSM), discipline, dominance and submission, sadomasochism, and other related interpersonal dynamics. Given ...
community. The reasoning behind this is that "coming-out" had become primarily the territory of the gay and lesbian, with bisexuals feeling the push to be one or the other (and being right only half the time either way). What he found in 2001, was that people in BDSM were open to discussion about the topic of bisexuality and pansexuality and all controversies they bring to the table, but personal biases and issues stood in the way of actively using such labels. A decade later, Lenius (2011) looked back on his study and considered if anything has changed. He concluded that the standing of bisexuals in the BDSM and kink community was unchanged, and believed that positive shifts in attitude were moderated by society's changing views towards different sexualities and orientations. But Lenius (2011) does emphasize that the pansexual promoting BDSM community helped advance greater acceptance of alternative sexualities. Brandy Lin Simula (2012), on the other hand, argues that BDSM actively resists gender conforming and identified three different types of BDSM bisexuality: gender-switching, gender-based styles (taking on a different gendered style depending on gender of partner when playing), and rejection of gender (resisting the idea that gender matters in their play partners). Simula (2012) explains that practitioners of BDSM routinely challenge our concepts of sexuality by pushing the limits on pre-existing ideas of sexual orientation and gender norms. For some, BDSM and kink provides a platform in creating identities that are fluid, ever-changing.


In feminism

Feminist positions on bisexuality range greatly, from acceptance of bisexuality as a feminist issue to rejection of bisexuality as reactionary and anti-feminist
backlash Backlash may refer to: Literature * '' Backlash: The Undeclared War Against American Women'', a 1991 book by Susan Faludi * ''Backlash'' (Star Wars novel), a 2010 novel by Aaron Allston * Backlash (Marc Slayton), a comic book character from ...
to
lesbian feminism Lesbian feminism is a cultural movement and critical perspective that encourages women to focus their efforts, attentions, relationships, and activities towards their fellow women rather than men, and often advocates lesbianism as the logica ...
. A number of women who were at one time involved in lesbian-feminist activism have since come out as bisexual after realizing their attractions to men. A widely studied example of lesbian-bisexual conflict in feminism was the
Northampton Northampton ( ) is a town and civil parish in Northamptonshire, England. It is the county town of Northamptonshire and the administrative centre of the Unitary authorities of England, unitary authority of West Northamptonshire. The town is sit ...
Pride March in
Massachusetts Massachusetts ( ; ), officially the Commonwealth of Massachusetts, is a U.S. state, state in the New England region of the Northeastern United States. It borders the Atlantic Ocean and the Gulf of Maine to its east, Connecticut and Rhode ...
during the years between 1989 and 1993, where many feminists involved debated over whether bisexuals should be included and whether or not bisexuality was compatible with feminism. Common lesbian-feminist critiques leveled at bisexuality were that bisexuality was anti-feminist, that bisexuality was a form of
false consciousness In Marxist theory, false consciousness is a term describing the ways in which material, ideological, and institutional processes are said to mislead members of the proletariat and other class actors within capitalist societies, concealing the ...
, and that bisexual women who pursue relationships with men were "deluded and desperate." Tensions between bisexual feminists and lesbian feminists have eased since the 1990s, as bisexual women have become more accepted in the feminist community, but some lesbian feminists such as
Julie Bindel Julie Bindel (born 20 July 1962) is an English radical feminist writer. She co-founded Justice for Women, which helps women who have been prosecuted for assaulting or killing violent male partners. A former visiting researcher at the Univer ...
are still critical of bisexuality. Bindel has described female bisexuality as a "fashionable trend" being promoted due to "sexual hedonism" and broached the question of whether bisexuality even exists. She has also made
tongue-in-cheek Tongue-in-cheek is an idiom that describes a humorous or sarcastic statement expressed in a serious manner. History The phrase originally expressed contempt, but by 1842 had acquired its modern meaning. Early users of the phrase include Sir Walte ...
comparisons of bisexuals to cat fanciers and devil worshippers.
Sheila Jeffreys Sheila Jeffreys (born 13 May 1948) is a former professor of political science at the University of Melbourne, born in England. A lesbian feminist scholar, she analyses the history and politics of human sexuality. Jeffreys' argument that the " ...
writes in ''The Lesbian Heresy'' that while many feminists are comfortable working alongside gay men, they are uncomfortable interacting with bisexual men. Jeffreys states that while gay men are unlikely to sexually harass women, bisexual men are just as likely to be bothersome to women as heterosexual men.
Donna Haraway Donna Jeanne Haraway (born September 6, 1944) is an American professor emerita in the history of consciousness and feminist studies departments at the University of California, Santa Cruz, and a prominent scholar in the field of science and te ...
was the inspiration and genesis for
cyberfeminism Cyberfeminism is a feminist approach which foregrounds the relationship between cyberspace, the Internet, and technology. It can be used to refer to a philosophy, art practices, methodologies or community. The term was coined in the early 1990s to ...
with her 1985 essay "A Cyborg Manifesto: Science, Technology, and Socialist-Feminism in the Late Twentieth Century" which was reprinted in ''Simians, Cyborgs and Women: The Reinvention of Nature'' (1991). Haraway's essay states that the cyborg "has no truck with bisexuality, pre-oedipal symbiosis, unalienated labor, or other seductions to organic wholeness through a final appropriation of all powers of the parts into a higher unity." A bisexual woman filed a lawsuit against the magazine '' Common Lives/Lesbian Lives'', alleging discrimination against bisexuals when her submission was not published.


History

Ancient Greeks and Romans did not associate sexual relations with well-defined labels, as modern Western society does. Men who had male lovers were not identified as homosexual, and may have had wives or other female lovers.
Ancient Greek Ancient Greek (, ; ) includes the forms of the Greek language used in ancient Greece and the classical antiquity, ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Greek ...
religious texts, reflecting cultural practices, incorporated bisexual themes. The subtexts varied, from the mystical to the didactic.
Sparta Sparta was a prominent city-state in Laconia in ancient Greece. In antiquity, the city-state was known as Lacedaemon (), while the name Sparta referred to its main settlement in the Evrotas Valley, valley of Evrotas (river), Evrotas rive ...
ns thought that love and erotic relationships between experienced and novice soldiers would solidify combat loyalty and
unit cohesion Unit cohesion is a military concept, defined by one former United States Chief of staff in the early 1980s as "the bonding together of soldiers in such a way as to sustain their will and commitment to each other, the unit, and mission accomplishme ...
, and encourage heroic tactics as men vied to impress their lovers. Once the younger soldiers reached maturity, the relationship was supposed to become non-sexual, but it is not clear how strictly this was followed. There was some stigma attached to young men who continued their relationships with their mentors into adulthood. For example,
Aristophanes Aristophanes (; ; ) was an Ancient Greece, Ancient Greek Ancient Greek comedy, comic playwright from Classical Athens, Athens. He wrote in total forty plays, of which eleven survive virtually complete today. The majority of his surviving play ...
calls them , meaning 'wide arses', and depicts them like women. Similarly, in
ancient Rome In modern historiography, ancient Rome is the Roman people, Roman civilisation from the founding of Rome, founding of the Italian city of Rome in the 8th century BC to the Fall of the Western Roman Empire, collapse of the Western Roman Em ...
, gender did not determine whether a sexual partner was acceptable, as long as a man's enjoyment did not encroach on another man's integrity. It was socially acceptable for a freeborn Roman man to want sex with both female and male partners, as long as he took the penetrative role. The morality of the behavior depended on the social standing of the partner, not gender ''per se''. Both women and young men were considered normal objects of desire, but outside marriage a man was supposed to act on his desires only with slaves, prostitutes (who were often slaves), and the . It was immoral to have sex with another freeborn man's wife, his marriageable daughter, his underage son, or with the man himself; sexual use of another man's slave was subject to the owner's permission. Lack of self-control, including in managing one's
sex life In human sexuality, a sex life is a sector of a person's day-to-day existence which may involve sexual activity or represent the absence of sexual activity. In general parlance, the term can have many sub-meanings and social layers, but generall ...
, indicated that a man was incapable of governing others; too much indulgence in "low sensual pleasure" threatened to erode the elite male's identity as a cultured person. In early modern times, John Hoyle was an Englishman known for his bisexuality.
Alfred Kinsey Alfred Charles Kinsey (; June 23, 1894 – August 25, 1956) was an American sexologist, biologist, and professor of entomology and zoology who, in 1947, founded the Institute for Sex Research at Indiana University, now known as the Kinsey Insti ...
conducted the first large surveys of homosexual behavior in the United States during the 1940s. The results shocked the readers of his day because they made same-sex behavior and attractions seem so common. His 1948 work '' Sexual Behavior in the Human Male'' stated that among men "nearly half (46%) of the population engages in both heterosexual and homosexual activities, or reacts to persons of both sexes, in the course of their adult lives" and that "37% of the total male population has at least some overt homosexual experience to the point of orgasm since the onset of adolescence." Kinsey himself disliked the use of the term ''bisexual'' to describe individuals who engage in sexual activity with both males and females, preferring to use ''bisexual'' in its original, biological sense as
hermaphroditic A hermaphrodite () is a sexually reproducing organism that produces both male and female gametes. Animal species in which individuals are either male or female are gonochoric, which is the opposite of hermaphroditic. The individuals of many ...
, stating, "Until it is demonstrated
hat A hat is a Headgear, head covering which is worn for various reasons, including protection against weather conditions, ceremonial reasons such as university graduation, religious reasons, safety, or as a fashion accessory. Hats which incorpor ...
taste in a sexual relation is dependent upon the individual containing within his anatomy both male and female structures, or male and female physiological capacities, it is unfortunate to call such individuals bisexual." Although more recent researchers believe that Kinsey overestimated the rate of same-sex attraction, his work is considered pioneering and some of the most well known sex research of all time.


Media

Bisexuality tends to be associated with negative media portrayals; references are sometimes made to stereotypes or mental disorders. In an article regarding the 2005 film ''Brokeback Mountain'', sex educator Amy Andre argued that in films, bisexuals are often depicted negatively: Using a content analysis of more than 170 articles written between 2001 and 2006, sociologist Richard N. Pitt Jr. concluded that the media pathologized black bisexual men's behavior while either ignoring or sympathizing with white bisexual men's similar actions. He argued that the black bisexual man is often described as a ''duplicitous heterosexual'' man spreading the HIV/AIDS virus. Alternatively, the white bisexual man is often described in pitying language as a '' victimized homosexual'' man forced into the closet by the heterosexist society around him.


Film

In 1914 the first documented appearance of bisexual characters (female and male) in an American motion picture occurred in '' A Florida Enchantment'', by Sidney Drew. However, under the censorship required by the
Hays Code The Motion Picture Production Code was a set of industry guidelines for the self-censorship of content that was applied to most motion pictures released by major studios in the United States from 1934 to 1968. It is also popularly known as th ...
, the word ''bisexual'' could not be mentioned, and almost no bisexual characters appeared in American film from 1934 until 1968. Notable and varying portrayals of bisexuality can be found in mainstream movies such as '' Something for Everyone'' (1970), ''
Sunday Bloody Sunday "Sunday Bloody Sunday" is a song by Irish rock band U2. It is the opening track from their 1983 album '' War'' and was released as the album's third single on 21 March 1983 in the Netherlands and West Germany. "Sunday Bloody Sunday" is noted ...
'' (1971), ''
The Rocky Horror Picture Show ''The Rocky Horror Picture Show'' is a 1975 independent musical comedy horror film produced by Lou Adler and Michael White, directed by Jim Sharman, and distributed by 20th Century Fox. The screenplay was written by Sharman and Richard O ...
'' (1975), '' The Fourth Man'' (1983), ''
Henry & June ''Henry & June'' is a 1990 American biographical drama film directed by Philip Kaufman, and starring Fred Ward, Uma Thurman, and Maria de Medeiros. It is loosely based on the posthumously published 1986 Anaïs Nin book of the same name, ...
'' (1990), ''
Basic Instinct ''Basic Instinct'' is a 1992 erotic thriller film directed by Paul Verhoeven and written by Joe Eszterhas. Starring Michael Douglas, Sharon Stone, George Dzundza, Jeanne Tripplehorn, and Wayne Knight, the film follows the detective Nick ...
'' (1992), ''
Showgirls ''Showgirls'' is a 1995 erotic drama film directed by Paul Verhoeven, written by Joe Eszterhas, starring Elizabeth Berkley, Kyle MacLachlan, Gina Gershon, Glenn Plummer, Robert Davi, Alan Rachins, and Gina Ravera. The film focuses on an ambi ...
'' (1995), ''
The Pillow Book is a book of observations and musings recorded by Sei Shōnagon during her time as court lady to Fujiwara no Teishi, Empress Consort Teishi during the 990s and early 1000s in Heian-period Japan. The book was completed in the year 1002. The wor ...
'' (1996), ''
Chasing Amy ''Chasing Amy'' is a 1997 American romantic comedy-drama film written and directed by Kevin Smith and starring Ben Affleck, Joey Lauren Adams and Jason Lee. The third film in Smith's View Askewniverse series, the film is about a male comic a ...
'' (1997), '' Velvet Goldmine'' (1998), ''
Kissing Jessica Stein ''Kissing Jessica Stein'' is a 2001 American independent romantic comedy film written and co-produced by the film's stars, Jennifer Westfeldt and Heather Juergensen, and directed by Charles Herman-Wurmfeld. The film also stars Scott Cohen, ...
'' (2001), '' Mulholland Drive'' (2001), ''
Frida Frida, Frieda, or Freida may refer to: People and fictional characters *Frida (given name), any of several people or characters ** *Frieda (surname), any of several people or characters *Afroditi Frida (born 1964), Greek singer *Frida (singer) ...
'' (2002), '' The Rules of Attraction'' (2002), ''
Alexander Alexander () is a male name of Greek origin. The most prominent bearer of the name is Alexander the Great, the king of the Ancient Greek kingdom of Macedonia who created one of the largest empires in ancient history. Variants listed here ar ...
'' (2004), ''
Brokeback Mountain ''Brokeback Mountain'' is a 2005 American neo-Western romantic drama film directed by Ang Lee and produced by Diana Ossana and James Schamus. Adapted from Brokeback Mountain (short story), the 1997 short story by Annie Proulx, the screenplay ...
'' (2005), ''
Black Swan The black swan (''Cygnus atratus'') is a large Anatidae, waterbird, a species of swan which breeds mainly in the southeast and southwest regions of Australia. Within Australia, the black swan is nomadic, with erratic migration patterns dependent ...
'' (2010), and '' Call Me by Your Name'' (2017).


Literature

Virginia Woolf Adeline Virginia Woolf (; ; 25 January 1882 28 March 1941) was an English writer and one of the most influential 20th-century modernist authors. She helped to pioneer the use of stream of consciousness narration as a literary device. Vir ...
's '' Orlando: A Biography'' (1928) is an early example of bisexuality in literature. The story, of a man who changes into a woman without a second thought, was based on the life of Woolf's lover
Vita Sackville-West Victoria Mary, Lady Nicolson, Order of the Companions of Honour, CH (née Sackville-West; 9 March 1892 – 2 June 1962), usually known as Vita Sackville-West, was an English author and garden designer. Sackville-West was a successful nov ...
. Woolf used the gender switch to avoid the book being banned for homosexual content. The pronouns switch from male to female as Orlando's gender changes. Woolf's lack of definite pronouns allows for ambiguity and lack of emphasis on gender labels.Livia, Anna (2000). ''Pronoun Envy: Literary Uses of Linguistic Gender.'' Oxford University Press, Her 1925 book ''
Mrs Dalloway ''Mrs Dalloway'' is a novel by Virginia Woolf published on 14 May 1925. It details a day in the life of Clarissa Dalloway, a fictional upper-class woman in post-First World War England. The working title of ''Mrs Dalloway'' was ''The Hours ...
'' focused on a bisexual man and a bisexual woman in sexually unfulfilled heterosexual marriages in later life. Following Sackille-West's death, her son
Nigel Nicolson Nigel Nicolson (19 January 1917 – 23 September 2004) was an English writer, publisher and politician. Early life and education Nicolson was the second son of writers Sir Harold Nicolson and Vita Sackville-West; he had an elder brother Bene ...
published ''
Portrait of a Marriage ''Portrait of a Marriage: Vita Sackville-West and Harold Nicolson'' is the 1973 biography of writer and gardener Vita Sackville-West compiled by her son Nigel Nicolson from her journals and letters. Synopsis The book relates to Sackville-West ...
'', one of her diaries recounting her affair with a woman during her marriage to
Harold Nicolson Sir Harold George Nicolson (21 November 1886 – 1 May 1968) was a British politician, writer, broadcaster and gardener. His wife was Vita Sackville-West. Early life and education Nicolson was born in Tehran, Persia, the youngest son of dipl ...
. Other early examples include works of D.H. Lawrence, such as ''
Women in Love ''Women in Love'' is a 1920 novel by English author D. H. Lawrence. It is a sequel to his earlier novel, '' The Rainbow'' (1915), and follows the continuing loves and lives of the Brangwen sisters, Gudrun and Ursula. Gudrun Brangwen, an arti ...
'' (1920), and
Colette Sidonie-Gabrielle Colette (; 28 January 1873 – 3 August 1954), known as Colette or Colette Willy, was a French author and woman of letters. She was also a Mime artist, mime, actress, and journalist. Colette is best known in the English-speaki ...
's '' Claudine'' (1900–1903) series. The main character in
Patrick White Patrick Victor Martindale White (28 May 1912 – 30 September 1990) was an Australian novelist and playwright who explored themes of religious experience, personal identity and the conflict between visionary individuals and a materialistic, co ...
's novel, '' The Twyborn Affair'' (1979), is bisexual. Contemporary novelist
Bret Easton Ellis Bret Easton Ellis (born March 7, 1964) is an American author and screenwriter. Ellis was one of the literary Brat Pack (literary), Brat Pack and is a self-proclaimed satirist whose trademark technique as a writer is the expression of extreme acts ...
' novels, such as '' Less than Zero'' (1985) and '' The Rules of Attraction'' (1987) frequently feature bisexual male characters; this "casual approach" to bisexual characters recurs throughout Ellis' work.


Music

Rock musician
David Bowie David Robert Jones (8 January 194710 January 2016), known as David Bowie ( ), was an English singer, songwriter and actor. Regarded as one of the most influential musicians of the 20th century, Bowie was acclaimed by critics and musicians, pa ...
famously declared himself bisexual in an interview with ''
Melody Maker ''Melody Maker'' was a British weekly music magazine, one of the world's earliest music weeklies; according to its publisher, IPC Media, the earliest. In January 2001, it was merged into "long-standing rival" (and IPC Media sister publicatio ...
'' in January 1972, a move coinciding with the first shots in his campaign for stardom as Ziggy Stardust. In a September 1976 interview with ''
Playboy ''Playboy'' (stylized in all caps) is an American men's Lifestyle journalism, lifestyle and entertainment magazine, available both online and in print. It was founded in Chicago in 1953 by Hugh Hefner and his associates, funded in part by a $ ...
'', Bowie said, "It's true—I am a bisexual. But I can't deny that I've used that fact very well. I suppose it's the best thing that ever happened to me." In a 1983 interview, he said it was "the biggest mistake I ever made", elaborating in 2002 he explained "I don't think it was a mistake in Europe, but it was a lot tougher in America. I had no problem with people knowing I was bisexual. But I had no inclination to hold any banners or be a representative of any group of people. I knew what I wanted to be, which was a songwriter and a performer ..America is a very puritanical place, and I think it stood in the way of so much I wanted to do."
Queen Queen most commonly refers to: * Queen regnant, a female monarch of a kingdom * Queen consort, the wife of a reigning king * Queen (band), a British rock band Queen or QUEEN may also refer to: Monarchy * Queen dowager, the widow of a king * Q ...
singer
Freddie Mercury Freddie Mercury (born Farrokh Bulsara; 5 September 1946 – 24 November 1991) was a British singer and songwriter who achieved global fame as the lead vocalist and pianist of the rock band Queen (band), Queen. Regarded as one of the gre ...
was also open about his bisexuality, though he did not publicly discuss his relationships. In 1995, Jill Sobule sang about
bi-curiosity Bi-curious (also bicurious) is a term for a person, usually someone who is a self-identified heterosexual, who is curious or open about engaging in sexual activity with a person whose sex differs from that of their usual sexual partners. The term ...
in her song "I Kissed a Girl", with a video that alternated images of Sobule and a boyfriend along with images of her with a girlfriend. Another song with the same name by
Katy Perry Katheryn Elizabeth Hudson (born October 25, 1984), known professionally as Katy Perry, is an American singer, songwriter, and television personality. She is one of the List of best-selling music artists, best-selling music artists in hist ...
also hints at the same theme. Some activists, researchers, and general listeners suggest Perry's song merely reinforces the stereotype of bisexuals experimenting and of bisexuality not being a real sexual preference.
Lady Gaga Stefani Joanne Angelina Germanotta (born March 28, 1986), known professionally as Lady Gaga, is an American singer, songwriter, and actress. Known for her image reinventions and versatility across the entertainment industry, she is an influ ...
has also stated that she is bisexual, and has acknowledged that her song " Poker Face" is about fantasizing about a woman while being with a man.
Brian Molko Brian Molko (born 10 December 1972) is a British-American musician who is the lead vocalist, guitarist, and lyricist of the band Placebo (band), Placebo. He is known for his nasal voice and high registered vocals, feminine/androgynous appearance ...
, lead singer of
Placebo A placebo ( ) can be roughly defined as a sham medical treatment. Common placebos include inert tablets (like sugar pills), inert injections (like saline), sham surgery, and other procedures. Placebos are used in randomized clinical trials ...
, is openly bisexual.
Green Day Green Day is an American Rock music, rock band formed in Rodeo, California, in 1987 by lead vocalist and guitarist Billie Joe Armstrong and bassist and backing vocalist Mike Dirnt, with drummer Tré Cool joining in 1990. In 1994, their majo ...
frontman
Billie Joe Armstrong Billie Joe Armstrong (born February 17, 1972) is an American musician and actor. He is best known for being the lead vocalist, guitarist, and primary songwriter of the rock band Green Day, which he co-founded with Mike Dirnt in 1987. He is als ...
has also identified himself as bisexual, saying in a 1995 interview with ''
The Advocate An advocate is a professional in the field of law. The Advocate, The Advocates or Advocate may also refer to: Magazines * The Advocate (magazine), ''The Advocate'' (magazine), an LGBT magazine based in the United States * ''The Harvard Advocate' ...
'', "I think I've always been bisexual. I mean, it's something that I've always been interested in. I think people are born bisexual, and it's just that our parents and society kind of veer us off into this feeling of 'Oh, I can't.' They say it's taboo. It's ingrained in our heads that it's bad, when it's not bad at all. It's a very beautiful thing." In 2014, Armstrong discussed songs such as "Coming Clean" stating, "It was a song about questioning myself. There are these other feelings you may have about the same sex, the opposite sex, especially being in Berkeley and San Francisco then. People are acting out what they're feeling: gay, bisexual, transgender, whatever. And that opens up something in society that becomes more acceptable. Now we have gay marriage becoming recognized... I think it's a process of discovery. I was willing to try anything."


Television

In the
Netflix Netflix is an American subscription video on-demand over-the-top streaming service. The service primarily distributes original and acquired films and television shows from various genres, and it is available internationally in multiple lang ...
original series ''
Orange is the New Black ''Orange Is the New Black'' (sometimes abbreviated to ''OITNB'') is an American comedy-drama television series created by Jenji Kohan for Netflix. The series is based on Piper Kerman's memoir '' Orange Is the New Black: My Year in a Women's Pr ...
'', the main character, Piper Chapman, played by actress Taylor Schilling, is a bisexual female inmate who is shown having relationships with both men and women. In season one, before entering the prison, Piper is engaged to male fiancé Larry Bloom, played by actor
Jason Biggs Jason Matthew Biggs (born May 12, 1978) is an American actor. The accolades he has received include a Screen Actors Guild Awards, Screen Actors Guild Award, alongside nominations for a Daytime Emmy Awards, Daytime Emmy Award and a Satellite Award ...
. Then, upon entering the prison, she reconnects with former lover (and fellow inmate), Alex Vause, played by
Laura Prepon Laura Prepon ( ; born March 7, 1980) is an American actress and television director. She rose to fame with her role as Donna Pinciotti in the Fox sitcom ''That '70s Show'' (1998–2006). She is also known for portraying Alex Vause in the Net ...
.Zeilinger, Julie
"5 Myths 'Orange Is the New Black' Has Accidentally Dispelled About Bisexuality"
Mic Network Inc., 12 June 2015. .
Another character who is portrayed as bisexual in the show is an inmate named Lorna Morello, played by actress Yael Stone. She has an intimate relationship with fellow inmate Nicky Nichols, played by Natasha Lyonne, while still yearning for her male "fiance", Christopher MacLaren, played by Stephen O'Reilly. The
FOX Foxes are small-to-medium-sized omnivorous mammals belonging to several genera of the family Canidae. They have a flattened skull; upright, triangular ears; a pointed, slightly upturned snout; and a long, bushy tail ("brush"). Twelve species ...
television series ''
House A house is a single-unit residential building. It may range in complexity from a rudimentary hut to a complex structure of wood, masonry, concrete or other material, outfitted with plumbing, electrical, and heating, ventilation, and air c ...
'' features a bisexual female doctor, Remy "Thirteen" Hadley, played by
Olivia Wilde Olivia Wilde (born Olivia Jane Cockburn, , March 10, 1984) is an American actress and director. She played Thirteen (House), Remy "Thirteen" Hadley on the medical-drama television series ''House (TV series), House'' (2007–2012), and appeared ...
, from season four onwards. The same network had earlier aired the television series '' The O.C.'', which for a time featured bisexual Alex Kelly (also played by Olivia Wilde), the local rebellious hangout spot's manager, as a love interest of
Marissa Cooper Marissa Cooper is a fictional character on the FOX television series '' The O.C.'', portrayed by Mischa Barton. Marissa was among the original "core four" characters on ''The O.C.'' She is a privileged California native born into a wealthy fami ...
. In the
HBO Home Box Office (HBO) is an American pay television service, which is the flagship property of namesake parent-subsidiary Home Box Office, Inc., itself a unit owned by Warner Bros. Discovery. The overall Home Box Office business unit is based a ...
drama ''Oz (TV series), Oz'', Chris Keller was a bisexual serial killer who tortured and raped various men and women. Beginning with the 2009 season, MTV's ''The Real World (TV series), The Real World'' series featured two bisexual characters, Emily Schromm, and Mike Manning. The Showcase (Canadian TV channel), Showcase supernatural crime drama, ''Lost Girl (TV series), Lost Girl'', about creatures called Fairy, Fae who live secretly among humans, features a bisexual protagonist, Bo (Lost Girl), Bo, played by Anna Silk. In the story arc she is involved in a love triangle between Dyson, a wolf-shapeshifter (played by Kris Holden-Ried), and Lauren Lewis, a human doctor (played by Zoie Palmer) in servitude to the leader of the Light Fae clan. In the BBC TV science fiction show ''Torchwood'', several of the main characters appear to have fluid sexuality. Most prominent among these is Jack Harkness, Captain Jack Harkness, a pansexual who is the lead character and an otherwise conventional science fiction action hero. Within the logic of the show, where characters can also interact with alien species, producers sometimes use the term "omnisexual" to describe him. Jack's ex, Captain John Hart (Torchwood), Captain John Hart, is also bisexual. Of his female exes, significantly at least one ex-wife and at least one woman with whom he has had a child have been indicated. Some critics draw the conclusion that the series more often shows Jack with men than women. Creator Russell T Davies says one of pitfalls of writing a bisexual character is you "fall into the trap" of "only having them sleep with men." He describes of the show's Torchwood: Miracle Day, fourth series, "You'll see the full range of his appetites, in a really properly done way." The preoccupation with bisexuality has been seen by critics as complementary to other aspects of the show's themes. For heterosexual character Gwen Cooper, for whom Jack harbors romantic feelings, the new experiences she confronts at Torchwood Institute, Torchwood, in the form of "affairs and homosexuality and the threat of death", connote not only the Other but a "missing side" to the Self. Under the influence of an alien pheromone, Gwen kisses a woman in Day One (Torchwood), Episode 2 of the series. In Everything Changes (Torchwood), Episode 1, heterosexual Owen Harper kisses a man to escape a fight when he is about to take the man's girlfriend. Quiet Toshiko Sato is in love with Owen, but has also had brief romantic relationships with a female alien and a male human.


Webseries

In October 2009, "A Rose By Any Other Name" was released as a "webisode" series on YouTube. Directed by bisexual rights advocate Kyle Schickner, the plot centers around a lesbian-identified woman who falls in love with a straight man and discovers she is actually bisexual.


Among other animals

Some non-human animal species exhibit bisexual behavior. Examples of mammals that display such behavior include the bonobo, orca, walrus, and the bottlenose dolphin. Examples of birds include some species of gulls and Humboldt penguins. Other examples of bisexual behavior occur among fish and flatworms.


See also

* Bicurious * Biphobia * Bisexual chic * Bisexual erasure * Bisexual literature * Bisexual theory * ''Journal of Bisexuality'' * List of bisexual characters in literature * Lists of bisexual people, List of bisexual people * List of gay, lesbian or bisexual people * List of LGBT characters in television and radio * List of LGBT-related organizations * List of media portrayals of bisexuality * Situational sexual behavior * Victimization of bisexual women


References


Further reading


Historical

* Eva Cantarella. ''iarchive:bisexualityinanc0000cant, Bisexuality in the Ancient World'', Yale University Press, New Haven, 1992, 2002. * Kenneth J. Dover. ''iarchive:greekhomosexuali00dove, Greek Homosexuality'', New York; Vintage Books, 1978. * Thomas K. Hubbard. ''iarchive:homosexualitying0000unse, Homosexuality in Greece and Rome'', U. of California Press, 2003. * William Armstrong Percy, III, W. A. Percy III. ''iarchive:pederastypedagog00perc, Pederasty and Pedagogy in Archaic Greece,'' University of Illinois Press, 1996. * Stephen O. Murray and Will Roscoe, et al. ''iarchive:islamichomosexua0000murr, Islamic Homosexualities: Culture, History, and Literature,'' New York: New York University Press, 1997. * J. Wright & Everett Rowson. ''Homoeroticism in Classical Arabic Literature''. 1998. (pbbk)/ (hdbk) * Gary Leupp. ''Male Colors: The Construction of Homosexuality in Tokugawa Japan,'' Berkeley, University of California Press, 1995. * Tsuneo Watanabe & Jun'ichi Iwata. ''The Love of the Samurai. A Thousand Years of Japanese Homosexuality,'' London: GMP Publishers, 1987. *
Sigmund Freud Sigmund Freud ( ; ; born Sigismund Schlomo Freud; 6 May 1856 – 23 September 1939) was an Austrian neurologist and the founder of psychoanalysis, a clinical method for evaluating and treating psychopathology, pathologies seen as originating fro ...
. ''Three Contributions to the Theory of Sex''.


Modern

* ''Bisexuality: Theories, Research, and Recommendations for the Invisible Sexuality'' by D. Joye Swan and Shani Habibi, Editors, * ''iarchive:dualattractionun00wein, Dual Attraction: Understanding Bisexuality'' by Martin S. Weinberg, Colin J. Williams, & Douglas W. Pryor, * ''iarchive:bianyothernamebi00hutc, Bi Any Other Name: Bisexual People Speak Out'' by Loraine Hutchins, Editor & Lani Ka'ahumanu, Editor, * ''iarchive:gettingbivoiceso0000unse, Getting Bi: Voices of Bisexuals Around the World'' by Robyn Ochs, Editor & Sarah Rowley, Editor, * ''iarchive:bisexualoption0000klei, The Bisexual Option'' by Fritz Klein, MD, * ''Bi Men: Coming Out Every Which Way'' by Ron Suresha and Pete Chvany, Editors, * ''iarchive:biamericamythstr0000burl, Bi America: Myths, Truths, And Struggles of an Invisible Community'' by William E. Burleson, * ''iarchive:bisexualityinuni0000unse, Bisexuality in the United States: A Social Science Reader'' by Paula C. Rodriguez Rust, Editor, * ''iarchive:bisexualitypsych00firerich, Bisexuality: The Psychology and Politics of an Invisible Minority'' by Beth A. Firestein, Editor, * ''iarchive:currentresearcho0000unse d3n7, Current Research on Bisexuality'' by Ronald C. Fox PhD, Editor, * Bryant, Wayne M. ''iarchive:bisexualcharacte0000brya, Bisexual Characters in Film: From Anais to Zee''. Haworth Gay & Lesbian Studies, 1997. .


External links

* of the American Institute of Bisexuality
American Psychological Association's Lesbian, Gay, Bisexual and Transgender Concerns Office

"Bisexuality" at the Magnus Hirschfeld Archive for Sexology
(archived 4 October 2008)
The Continuum Complete International Encyclopedia of Sexuality
(archived 21 May 2008) {{authority control Bisexuality, LGBTQ studies