Quote:
Originally posted by drawerfixer
I understood what you said, but you lost me at the 'base sexual attraction.' Homosexuality doesn't in any way shape or form seem natural or 'right', biology wise. It doesn't make sense for people of the same sex to be attracted. I just can't see _base_ sexual attraction to be biological.
I am, however, very ignorant in all aspects regarding homosexuality, so if I am wrong or misguided, please be kind. 
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There have been a number of studies that have shown:
1. homosexuality exists in other species so it's unlikely to be a purely social/psychological phenomenon;
2. homosexuality seems to have at least some genetic component to it;
3. homosexuality may be "caused" by some kind of hormonal influence while a fetus is still in utero.
The going theory right now is that some combination of genetics and prenatal hormone exposure produces changes in the brain while a fetus is still developing that make it highly likely that person will grow up to be homosexual. It's hard to pull apart the possible environmental/psychological aspects of it, but more and more people are coming to accept that gay people are
born gay, and that their sexual preference isn't a choice any more than heterosexuality is a choice. So, while it may not contribute to the propoagation of the species, it can still be considered "natural" in the sense of occuring for biological and not social reasons.