Samiksha Jaiswal (Editor)

Sexual fluidity

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Why millennials have such a different attitude toward sexual fluidity

Sexual fluidity is one or more changes in sexuality or sexual identity (sometimes known as sexual orientation identity). There is significant debate over whether sexuality is stable throughout life or is fluid and malleable. Scientific consensus is that sexual orientation, unlike sexual orientation identity, is not a choice. While scientists generally believe that sexual orientation is usually stable (unlikely to change), sexual identity can change throughout an individual's life, and may or may not align with biological sex, sexual behavior or actual sexual orientation. There is no consensus on the exact cause of developing a sexual orientation, but genetic, hormonal, social and cultural influences have been examined. Scientists believe that it is caused by a complex interplay of genetic, hormonal, and environmental influences.


Essentialism, in the context of sexual fluidity, is the belief that sexual orientation and sexual desire are fundamentally biological and therefore do not change throughout life. The results of a large-scale, longitudinal study by Savin-Williams, Joyner, and Rieger (2012) indicated that stability of sexual orientation identity over a six-year period was more common than change, particularly for men. While stability may be more common than change, change in sexual orientation identity does occur and the vast majority of research indicates that female sexuality is more fluid than male sexuality. This could be attributed to females' higher erotic plasticity or to sociocultural factors that socialize women to be more open to change. Due to the gender differences in the stability of sexual orientation identity, male and female sexuality are not treated as functioning via the same mechanisms. More research is needed to determine the fluidity of sexual orientation of subgroups (i.e., bisexual, lesbian, gay, etc.).

The term sexual fluidity is significantly promoted by Lisa M. Diamond.

Dr meredith chivers what is sexual fluidity


Often, sexual orientation and sexual orientation identity are not distinguished, which can impact accurately assessing sexual identity and whether or not sexual orientation is able to change; sexual orientation identity can change throughout an individual's life, and may or may not align with biological sex, sexual behavior or actual sexual orientation. While the Centre for Addiction and Mental Health and American Psychiatric Association state that sexual orientation is innate, continuous or fixed throughout their lives for some people, but is fluid or changes over time for others, the American Psychological Association distinguishes between sexual orientation (an innate attraction) and sexual orientation identity (which may change at any point in a person's life). Scientists and mental health professionals generally do not believe that sexual orientation is a choice.

The American Psychological Association states that "sexual orientation is not a choice that can be changed at will, and that sexual orientation is most likely the result of a complex interaction of environmental, cognitive and biological shaped at an early age...[and evidence suggests] biological, including genetic or inborn hormonal factors, play a significant role in a person's sexuality." They say that "sexual orientation identity—not sexual orientation—appears to change via psychotherapy, support groups, and life events." The American Psychiatric Association says "individuals maybe become aware at different points in their lives that they are heterosexual, gay, lesbian, or bisexual" and "opposes any psychiatric treatment, such as 'reparative' or 'conversion' therapy, which is based upon the assumption that homosexuality per se is a mental disorder, or based upon a prior assumption that the patient should change his/her homosexual orientation". They do, however, encourage gay affirmative psychotherapy.

In Sexual Fluidity, which was awarded with the 2009 Lesbian, Gay, Bisexual, and Transgender Issues Distinguished Book Award by Division 44 of the American Psychological Association, Diamond speaks of female sexuality and trying to go beyond the language of "phases" and "denial", arguing that traditional labels for sexual desire are inadequate. For some of 100 non-heterosexual women she followed in her study over a period of ten years, the word bisexual did not truly express the versatile nature of their sexuality. Diamond calls "for an expanded understanding of same-sex sexuality."

Diamond, when reviewing research on lesbian and bisexual women's sexual identities, stated that studies find "change and fluidity in same-sex sexuality that contradict conventional models of sexual orientation as a fixed and uniformly early-developing trait." She suggested that sexual orientation is a phenomenon more connected with female non-heterosexual sexuality, stating, "whereas sexual orientation in men appears to operate as a stable erotic 'compass' reliably channeling sexual arousal and motivation toward one gender or the other, sexual orientation in women does not appear to function in this fashion... As a result of these phenomena, women’s same-sex sexuality expresses itself differently from men’s same-sex sexuality at every stage of the life course."


The essentialist view holds that sexual orientation and sexual desire are fundamentally biological, and therefore do not change throughout life. In support of the essentialist view is the finding that conversion therapy (attempts to change sexual orientation) is rarely successful. In Maccio's (2011) review of sexual reorientation therapy attempts, she lists two studies that claim to have successfully converted gay men and lesbians to heterosexuals and four that demonstrate the contrary. She sought to settle the debate using a sample that was not recruited from religious organizations. The study consisted of 37 former conversion therapy participants (62.2% were male) from various cultural and religious backgrounds who currently or previously identified as lesbian, gay, or bisexual. The results indicated that there were no statistically significant shifts in sexual orientation from pre- to post-treatment. In follow-up sessions, the few changes in sexual orientation that did occur following therapy did not last. This study stands as support for the essentialist view of sexual orientation, but the largely male sample population confounds the findings.

Further support for the essentialist view of sexual orientation is that gender atypical behavior in childhood (i.e., a young boy playing with dolls) appears to predict homosexuality in adulthood (see childhood gender nonconformity). A longitudinal study by Drummond et al. (2008) looked at young girls with gender dysphoria (a significant example of gender atypical behavior) and found that the majority of these girls grew up to identity as bisexual or lesbian. Many retrospective studies looking at childhood behavior are criticized for potential memory errors; so a study by Rieger, Linsenmeier, Gygax, & Bailey (2008) used home videos to investigate the relationship between childhood behaviors and adult sexual orientation. The results of this study support essentialism, but an understanding of how cultural assumptions about sexuality can affect sexual identity formation is also considered.

There is strong evidence for a relationship between fraternal birth order and male sexual orientation, and there has been biological research done to investigate potential biological determinants of sexual orientation in men and women. One theory is the second to fourth finger ratio (2D:4D) theory. Some studies have discovered that heterosexual women had higher 2D:4D ratios than did lesbian women but the difference was not found between heterosexual and gay men. One study found that gay men have, on average, pelvic structures that more closely resemble that of females. Similarly, a study has shown that homosexual men have a sexually dimorphic nucleus in the anterior hypothalamus that is the size of females’. Twin and family studies have been conducted in an attempt to decipher the gene responsible for determining sexual orientation but have been unsuccessful. While some biological research has interesting results, a critical review by Mutanski, Chivers, and Bailey’s (2002) lists many methodological problems with such research on sexual orientation. The vast majority is done with only males and adults, many use problematic measures of sexual orientation, and the results have not been replicable.

Bisexuality as a transitional phase

Bisexuality as a transitional phase on the way to identifying as exclusively lesbian or gay has also been studied. In a large-scale, longitudinal study, participants who identified as bisexual at one point in time were especially likely to change sexual orientation identity throughout the six-year study. While this supports the idea that bisexuality is a transitional phase, the majority of the bisexual-identified participants that shifted sexual identity shifted towards heterosexuality. A second longitudinal study found conflicting results. If bisexuality is a transitional phase, as people grow older the number identifying as bisexual should decline. Over the 10-year span of this study (using a female-only sample), the overall number of individuals identifying as bisexual remained relatively constant (hovering between 50-60%), suggesting that bisexuality is a third orientation, distinct from homosexuality and heterosexuality and can be stable. A third longitudinal study by Kinnish, Strassberg, and Turner (2005) supports this theory. While sex differences in sexual orientation stability were found for heterosexuals and gays/lesbians, no sex difference was found for bisexual men and women.

Bisexuality remains "undertheorized and underinvestigated".


One study by Steven E. Mock and Richard P. Eibach from 2011 shows 2% of 2,560 adult participants included in National Survey of Midlife Development in the United States reported change of sexual orientation identities after a 10-year period: 0.78% of male and 1.36% of female persons that identified themselves to be heterosexuals at the beginning of the 10-year period, as well as 63.6% of lesbians, 64.7% of bisexual females, 9.52% of gay males, and 47% of bisexual males. According to the study, "this pattern was consistent with the hypothesis that heterosexuality is a more stable sexual orientation identity, perhaps because of its normative status. However, male homosexual identity, although less stable than heterosexual identity, was relatively stable compared to the other sexual minority identities". Having only adults included in the examined group, they did not find the differences in fluidity which were affected by age of the participants. However, they stated that "research on attitude stability and change suggests most change occurs in adolescence and young adulthood (Alwin & Krosnick, 1991; Krosnick & Alwin, 1989), which could explain the diminished impact of age after that point".

Males versus females

Research generally indicates that female sexuality is more fluid than male sexuality. In a seminal review of the sexual orientation literature, stimulated by the findings that the 1970s sexual revolution affected female sexuality more so than male sexuality, research by Baumeister et al. indicated that when compared to males, females have lower concordance between sexual attitudes and behaviors, and sociocultural factors affect female sexuality to a greater degree; it also found that personal change in sexuality is more common for females compared to males. Female sexuality (lesbian and heterosexual) changes significantly more than males on both dimensional and categorical measures of sexual orientation. Furthermore, the majority of homosexual women who previously identified as a different sexual orientation identified as heterosexual; whereas for males, the majority previously identified as bisexual, which the authors believe support the idea of greater fluidity in female sexuality. Females also report having identified with more than one sexual orientation, more often than males and are found to have higher levels of sexual orientation mobility. Females also report being bisexual or unsure of their sexuality more often than males, who more commonly report being exclusively gay or heterosexual. Over a six-year period, women have also been found to display more shifts in sexual orientation identity and were more likely to define their sexual orientation with non-exclusive terms.

The social constructivist view suggests that sexual desire is a product of cultural and psychosocial processes and that men and women are socialized differently. This difference in socialization can explain differences in sexual desire and stability of sexual orientation. Male sexuality is centered around physical factors, whereas female sexuality is centered around sociocultural factors, making female sexuality inherently more open to change. The greater effect on female sexuality in 1970s sexual revolution shows that female shifts in sexual orientation identity may be due to greater exposure to moderating factors (such as the media). In western culture, women are also expected to be more emotionally expressive and intimate towards both males and females. This socialization is a plausible cause of greater female sexual fluidity. Whether female sexuality is naturally more fluid and therefore changes from social factors or social factors cause female sexuality to be less stable is unknown.

Evolutionary perspectives propose that bisexuality ensures women have secure and consistent resources for their offspring by promoting the attainment of mothering contributions from other females. According to this view, women are capable of forming romantic bonds with both sexes and sexual fluidity may be explained as a reproductive strategy that ensures the survival of offspring.

While most studies point to female sexuality as being quite fluid, an influential longitudinal study concluded that stability of sexual orientation was more common than change. Gender differences in the stability of sexual orientation may vary by subgroup and could possibly be related to individual differences more than gender-wide characteristics.

Youth (age 14-21)

There has been some research done to investigate the fluidity of sexual orientation identity in youth. While these studies indicate that sexuality can be fluid in youth, there is less focus on gender differences and more on subgroup differences (i.e., lesbian, gay, heterosexual, etc.) in fluidity.

One study that did compare the stability of youth sexual orientation identity across genders found results opposite to most done with adult samples. The study compared non-heterosexual male and female sexual orientation over a year and concluded that female youth were more likely to report consistent sexual identities than males. The study was conducted over a single year. More research over longer time periods is necessary to come to any conclusions comparing the stability of sexuality in female and male youth.

Youth appears to be when most change in sexual orientation identity occurs for females. A 10-year study compared sexual orientation as measured at four times during the study. The most change was found between the first (taken at 18 years of age) and second (taken at 20 years of age) measurements which was the only time bracket that fell during adolescence.

A population-based study conducted over 6 years found that nonheterosexual (gay/lesbian/bisexual) male and female participants were more likely to change sexual orientation identity than heterosexual participants. A yearlong study found that sexual identity was more stable for gay and lesbian youth participants when compared to bisexual participants. These studies indicate that bisexual youth have the most fluid sexuality. Gay and lesbian youth have more consistent sexual orientation identity when compared to bisexual youth, but when compared to heterosexual youth their sexuality is more fluid.

The identity integration process that individuals go through during adolescence appears to be associated with changes in sexual identity; adolescents who score higher on identity integration measures are more consistent in their sexual orientation (8). Bisexual youths seem to take longer to form their sexual identities than do consistently homosexual or heterosexual identifying youths so bisexuality may be seen as a transitional phase during adolescence. Rosario et al. (2006) conclude that "acceptance, commitment, and integration of a gay/lesbian identity is an ongoing developmental process that, for many youths, may extend through adolescence and beyond." The fluidity of sexuality during adolescence may not reflect absolute changes in sexual orientation but rather a process of change. While results of studies interested in the stability of youth sexuality are interesting, they must not be compared to those looking at adult sexuality.

Transgender individuals

There is little to no research to date on the stability of sexual orientation identity within the transgender community. They may be studied independently from those identifying with culturally conventional gender roles. Some transgender individuals do not consistently identify as one gender and some consider the conventional sexual orientation labels inadequate. Developments in research suggests that transgender individuals are likely to classify their sexual orientation in non-binary ways, using their past and present sexual experiences and feelings to represent their sexual orientation, as opposed to using those which are based on traditional sex or gender descriptions.

Cultural debate

The exploration on sexual fluidity initiated by Lisa M. Diamond presented a cultural challenge to the LGBT community; this is because although researchers usually emphasize that changes in sexual orientation are unlikely, despite conversion therapy attempts, sexual identity can change over time. That sexual orientation is not always stable challenges the views of many within the LGBT community, who believe that sexual orientation is fixed and immutable. For example, the public and media attention following Ruby Rose's debut on Orange Is the New Black largely concerned heterosexual women commenting on her physical appearance, and stating that they would "go gay for [her]"; this resulted in a new, open discourse about sexual fluidity and whether or not sexual orientation can change, with some of the media, including lesbian critics, expressing disapproval toward heterosexual women declaring that they would be romantically or sexuality interested in Rose.

Some researchers of sexual fluidity are members of the LGBT community. Diamond is a lesbian, and Ritch C. Savin-Williams is gay. People with sexual fluidity or a change in their sexual orientation identity may come out. This was the case with Chirlane McCray, the wife of Bill de Blasio, who spoke about entering into a marriage with a man 34 years after writing a 1979 essay about coming out as a lesbian. She stated that she "is more than just a label," and that she did not suddenly consider herself sexually attracted to men, but rather attracted to de Blasio.

There is some level of cultural debate regarding the questions how (and if) fluidity "works" among men, and the questions of fluctuations in attractions and arousal in male bisexuals.


Sexual fluidity Wikipedia