Lets just say that if you like the idea of touching another male's body (dressed as a woman or not) or engaging in intimate activities with someone with male genitalia, I'd say you're at least bi-sexual and probably gay if you aren't attracted to women. Some gay people may be attracted to the heightened femininity exhibited by male transvestites. Same thing with women I suppose, but because women can look mostly normal wearing men's clothes they're less often classified as "transvestites."
In the end the problem is that this words "homosexuality" and "heterosexuality" are just human ones. Nature doesn't have some sort of "gay straight switch" that is clearly defined. For that reason gray areas, such as being attracted to transvestites, exist.
(I suppose this one is My opinion and some may not agree, but I believe it quite fervently)
Myth It matters whether or not homosexuality is a choice or inborn.
Truth If homosexuality is a choice people have a right to choose to be gay. If it isn't, people have a right to be who they are. Neither situation justifies condemnation.
Myth Women become lesbians because they were raped or had some sort of bad experience with men.
Truth Women become lesbians because they decide that they like the idea of fucking women more. Not necessarily because of an inborn hatred of men.
Myth Two men who hate each other can randomly burst into gay sex if the situation is right.
Truth Sorry Fan Girls, no.
Myth Gay teachers and authority figures will try to "recruit" people into homosexuality
Truth A person wont randomly start to like men just because they had a role model that did.
Myth Seeing the naughty bits of other men will turn men gay
TruthPeople need to stop screaming "Oh Noes! Penis!"
Myth It's a valid criticism to say that homosexuals can't have babies and we would all die out if we were all gay.
Truth There's no fucking way everyone in the world is going to become gay. Furthermore, considering the overpopulation issues in the world we could do with a few more homosexuals to adopt and help more children find homes.