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Platonicmoose · 3951 days ago · link · · parent · post: How can a trait like male homosexuality persist over evolutionary time ?
Or: sexuality exists on a spectrum, and many people tend towards the poles because of cultural and social pressures. For instance, everyone thinks I'm straight because I'm married to a woman. Bisexual erasure is probably a big problem in sorting out how attraction to the same sex can be passed on genetically.