I would suspect that in lots of cases, being gay isn't a choice, it's a normal abnormality for which no amount of mental help or whatever is going to cure. Your position is archaic.
I have come to the conclusion that homosexuality is actually a type of fetish.
It seems to have all of the characteristics of one in that the fetish object must be present in some way for sexual arousal and it is not necessarily a voluntary condition, ie I don't know why I get turned on by cruel women in leather, nevertheless I do.
That sort of thing.