Most men that practice cross-dressing are transvestite
There is nothing to be ashamed of if one is born homosexual, or feels the need to cross-dress, but it would seem bizarre if heterosexuals had marches, and proclaimed that they were proud of being straight.
Our present society seems to have a far more repressive attitude to cross dressing than many previous ones, and the very idea of a man in sissy clothes, immediately brings forth thoughts of gay, queer and homosexual.