Bisexuals were found to have fewer personal insecurities than heterosexuals and homosexuals. Research indicates that bisexuality is influenced by biological, cognitive and cultural variables in interaction, and this leads to different types of bisexuality. 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. Rather, many species seem to have ingrained homosexual tendencies that are a regular part of their society. Disease or Way of Life? Weinberg , and Sue Kiefer Hammersmith, writing in Sexual Preference , reported that sexual preference was much less strongly connected with pre-adult sexual feelings among bisexuals than it was among heterosexuals and homosexuals. Because testosterone in general is important for sexual differentiation, this view offers an alternative to the suggestion that male homosexuality is genetic. 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. 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.
A widely studied example of lesbian-bisexual conflict within feminism was the Northampton Pride March during the years between and , where many feminists involved debated over whether bisexuals should be included and whether or not bisexuality was compatible with feminism. 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. Rather, many species seem to have ingrained homosexual tendencies that are a regular part of their society. Goode and Haber found bisexual women to be sexually mature earlier, masturbate and enjoy masturbation more and to be more experienced in different types of heterosexual contact. 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. 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. That is, there are probably no strictly gay critters, just bisexual ones. Research indicates that bisexuality is influenced by biological, cognitive and cultural variables in interaction, and this leads to different types of bisexuality. There is increasing inclusion and visibility of bisexuals, particularly in the LGBT community. 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. LeVay compares Hirschfeld's scale to that developed by Kinsey decades later. The same study found that 2. 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. In other words, someone does not have to be exclusively homosexual or heterosexual, but can feel varying degrees of both. Based on this and other findings, they suggested that bisexuality is more influenced by social and sexual learning than is exclusive homosexuality. In his view, this was true anatomically and therefore also psychologically, with sexual attraction to both sexes being an aspect of this psychological bisexuality. Common lesbian-feminist critiques leveled at bisexuality were that bisexuality was anti-feminist , that bisexuality was a form of false consciousness , and that bisexual women who pursue relationships with men were "deluded and desperate. 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. 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. 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. Chivers , and J. Bisexual men masturbated more but had fewer happy marriages than heterosexuals. Weinberg and Colin J. Studies measuring the fingers found a statistically significant skew in the 2D: Simula 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. In , researchers Gerulf Rieger, Meredith L.
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