Human sexuality is not limited to being gay, bisexual, lesbian or straight. Likewise all trans-something people, whether voluntarily or by virtue of circumstances, overstep the limitations of our traditional notions on gender roles and sexual identities.
Transvestites are merely men that enjoy wearing women's clothes.
To add some confusion, it should be added that both can be gay or straight, thus giving rise to so-called transgays and translesbians. Trans-people are bright and talented, they become renowned impersonators and travesti, they add colors and flavour to every show they partake in. Even the sternest homophobes cannot help admiring their artful performance. They make the key actors in shows of every progressive club, both gay and straight. There are only a handful of people in the world who look good in tight, see-through dresses.