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ooli · 3297 days ago · link · · parent · post: How can a trait like male homosexuality persist over evolutionary time ?
I probably posted the recent answer to that evolutionary problem (but might as well tell it here) : There is a gene increasing sexual drive toward male. If you're a female, with that gene you'll get more offspring. If you're a male, you'll be gay. Overall the gene is good in an evolutionary standpoint, so the trait 'homosexuality' last. BUT... still no gene, or scientific explanation for female homosexuality.