Among the male subjects, however, the straight men were more turned on by erotic films with women, the gay ones more by those with men. Sexuality, then, is seen as a participation in a larger social discourse and, though in some sense fluid, not as something strictly determinable by the individual. For men, a change occurred in 0. The Victorian work ethic had changed, pleasure became more highly valued and this allowed ideas of human sexuality to change. For example, people may state different sexual orientations depending on whether their immediate social environment is public or private.
At the same time medical doctors began to acquire more power and influence. While opposing conversion therapy, they encourage gay affirmative psychotherapy  and "encourages mental health professionals to avoid misrepresenting the efficacy of sexual orientation change efforts by promoting or promising change in sexual orientation when providing assistance to individuals distressed by their own or others' sexual orientation and concludes that the benefits reported by participants in sexual orientation change efforts can be gained through approaches that do not attempt to change sexual orientation". Diamond concluded that "although sexual attractions appear fairly stable, sexual identities and behaviors are more fluid. The Victorian work ethic had changed, pleasure became more highly valued and this allowed ideas of human sexuality to change. It can assign strict gender roles to males and females. Among the male subjects, however, the straight men were more turned on by erotic films with women, the gay ones more by those with men. Human mating strategies An intimate heterosexual couple Since the s and s, a large body of research has provided evidence and analysis of the extent to which heterosexuality and homosexuality are socially organized and historically changing. Fritz Klein 's sexual orientation grid in the s find distributions similar to those postulated by their predecessors. Scientists and mental health professionals generally do not believe that sexual orientation is a choice. It is important to note that traits such as these result from a combination of gene expression and developmental and other environmental factors. Reluctance to disclose one's actual sexual orientation is often referred to as "being in the closet. For men, a change occurred in 0. Rarely do individuals radically reorient their sexualities rapidly—and still less do they do so volitionally—but often sexualities expand, shift, and absorb new elements over decades. For women, a change occurred in 1. The basic oppositeness of the sexes was the basis for normal, healthy sexual attraction. Social history and terminology[ edit ] There was no real need to coin a term such as "heterosexual" until there was something else to contrast and compare it with. Nature and nurture[ edit ] The considerable " nature and nurture " debate exists over whether predominantly biological or psychological factors produce sexual orientation in humans, or whether both significantly factor into sexual orientation. Most sexual reproduction in the animal world is facilitated through opposite-sex sexual activity, although there are also animals that reproduce asexually , including protozoa and lower invertebrates. Consumer culture had created a market for the erotic, pleasure became commoditized. It has been characterized as "mostly straight". Yet just like intelligence, sexuality is a complex human feature that modern science is attempting to explain with genetics. Diamond on a sample of 80 non-heterosexual female adolescents age reported that half of the participants had changed sexual-minority identities more than once, one third of them during the 2-year follow-up. The researchers suggested that heterosexuality may be a more stable identity because of its normative status. It may include an assumption that everyone is heterosexual and may involve a varied level of discrimination against gays, lesbians, bisexuals, heteroflexibles , or transgender individuals. In some jurisdictions, when an unmarried man and woman live together long enough, they are deemed to have established a common-law marriage. Candidate factors include genes , the exposure of fetuses to certain hormones or lack thereof and environmental factors.
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