On the possible evolutionary underpinnings of the persistence of gays in the general population.
Homosexuality survives, not because gay men, per se, are adaptive, but because the gay gene makes straight men more successfully heterosexual. McKnight hypothesises that this homosexual genetic loading endows some straight men with two crucial characteristics - enhanced sexual drive and charm
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We have the occasional gay man (3% of the population according to McKnight) merely as an effect of too much of this libidinal and charming genetic loading in one individual. In McKnight’s terms, exclusively homosexual outcomes are a by-product of an enhanced heterosexuality.
As they say in the Orbit gum commercial, "Fabulous!"
Personally, I think #5 is the most like explaination.
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