Is Being Gay Hereditary/Genetic?

[mgsimpleton]

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I'm pretty sure plenty of homosexuals have engaged in heterosexual sex.

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i was waiting for someone to say that.

i do think there are some hereditary aspects of homosexuality. i have no evidence to back this up other than examples i have seen, but i know so many sets of identical twins who are both gay (and i cannot think of any where one is and one isn't). personally, my parents were both gay (but didn't individually realize it until long after they'd had me and my brother) and i am as well. i dont know what's going on with the bro but in any case i can point to so many families with gay parents and gay children. can this really be merely a coincidence? (and i dont believe for a second that if you grow up around gay parents you will "learn" to be gay)