A proof is mathematical/logical where there is NO doubt (not even a reasonable doubt) as to what has been posited. Hope that helps. I did not mean to be evasive, I just thought it was obvious.
I believe you or someone was making the claim that even a birth defect is natural and therefore OK.
So for the sake of discussion, let's assume homosexualtiy is natural. Don't we still get into a bee's nest? All birth defects are then natural according to someone on this thread. I have forgotten whom. But does this make them OK? Doesn't the medical community constantly look for cures or ways to treat the defects? They certainly do.
This is all I was trying to point out. I apologize if I wasn't clear enough. Just to say homosexuality is natural doesn't mean it is not to be treated like all other birth defects. Now AGAIN I am only playing the devil's advocate and not taking sides.
Sorry, I have to run but will be back this evening.