Is being gay biologically determined

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Some researchers state that solid scientific support for this is lacking. However, in the same study, the authors noted that "nongenetic alternative explanations cannot be ruled out" as a reason for the heterosexual in the homosexual-heterosexual twin pair having more partners, specifically citing "social pressure on the other twin to act in a more heterosexual way" and thus seek out a greater number of sexual partners as an example of one alternative explanation. Science Insider. Sign up for our email newsletter. Vasey and VanderLaan tested the theory on the Pacific island of Samoa, where they studied women, straight men, and the fa'afafine , men who prefer other men as sexual partners and are accepted within the culture as a distinct third gender category. In the U. Optic Nerve Stimulation to Aid the Blind.
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Homosexuality may be caused by chemical modifications to DNA

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Being Gay Not a Choice: Science Contradicts Ben Carson | Live Science

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Cross-Cultural Evidence for the Genetics of Homosexuality

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". What we did was to recruit groups of twins, identical and fraternal twins. That argument is based on the assumption that sexual preference is purely biological; therefore, it has no place in a discussion about the possible causes of homosexuality. Lions, chimpanzees, bison and dolphins have also been spotted in same-sex pairings.
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