Well there are some sissy men that simply dress in women's clothes or crossdress because of a fetish or due to confusion about their gender, believe it or not, in most cases, men are forced to wear feminine clothes by the love of their life (a woman).

These men are not gay and their wives and girlfriends love to see them in panties, bras, and other feminine clothes.

Often these couples have much better sex than the rest of the mankind. Look at this couple in which the girl dresses up his man in bra, panties (a boy short really, how ironical though), and pantyhose. And to give the whole Victoria's Secret angels look, he also has the wings.