[wideminded]

Anyway, there is scientific proof that homosexuality is not genetic. The fact that the identical twin of a gay man has only a 52% chance of being gay proves there is no gay gene. If it were genetic the twin brother would have a 100% chance of being gay.

That's true. But it is still possible that being gay involves something that goes wrong during pre-natal development of the brain. This could happen to one twin and not the other.

[Clint N. Suhks]

But it is still possible that being gay involves something that goes wrong during pre-natal development of the brain.

No proof of that either. If you’re referring to problems with androgen and testosterone production during gestation then you’d see a higher rates of homosexuality in intersex disorder victims and we don’t.