I'm not really an authority on this topic, but aren't there gay people out there who actually believe being gay is a choice? I was having this discussion with a bisexual friend of mine, and he compared liking men to "liking broccoli"—he can't recall actively choosing to like broccoli, but he doesn't think he was born liking it. He says his sexuality is similar, and that comparing sexuality to vegetables only seems inappropriate because society has attached undue importance to the type of people we're interested in. He thinks everyone is bi. I don't know if I agree, but I think it's a credible line of thought.
As a straight male, I find bacon and cheese to be delicious, and can really only tolerate broccoli if it's smothered in cheese, or asparagus if it's wrapped in bacon. Also, as a child I wouldn't eat rhubarb pie, because I knew what rhubarb looked like and the thought of it being in a pie was appalling. Of course, I eventually discovered that rhubarb, especially with strawberry or blackberry or blueberry, is delicious in a pie and will go to great lengths to obtain such even in a region where it's not readily available.
Hope that clears things up.
