How about this for yet another Category? Really Bi/Gay, but, due to damage inflicted by growing up in a homophobic society, can feel comfortable having sex with a man only when pretending to be a woman. Or, is this just another way of saying Androgynephiliac?
p.s. Reine, in reply to Marleena's question about BWTD men. If we exclude the Lipstick Lesbians from the answer, isn't that pretty much the definition of an Admirer?