I have to agree with Sam on this one...

Your taste in people is no different than your taste in anything else. I hate to make such a crude analogy, but I love Ketchup. I'm obsessed with the stuff. I'll put it on anything I eat. Now, with psychological training, sure, I could learn to prefer mustard, and possibly even so much as hate ketchup. But as long as I can remember, I've loved it. It's a defining characteristic of me. Similarly, (well, kind of), Some people are simply attracted to people of their own sex. It's as simple as that. Sure, they CAN change, but it's not a choice they originally made. It just happened.

-tainc