True, the social exposure a person gets during their childhood may perhaps dictate whether or not they become homosexual, but that still reiterates the point the homosexuals DON'T choose to be gay.
Personally, I think being a homosexual may come from a combination of social upbringing AND genes for some people, and for others, maybe just their social exposure during upbringing may dictate whether they become a homosexual (take children who have been sexually molested, just as one example...), and perhaps other people's sexuality is only dictated by genes...who knows.
Bottom line though is that they probably don't choose to be that way.
