+If you don't have the conceptual vocabulary to say, "I have a lot of these beautiful pure sacred self-identity feelings about being female, but it seems like a pretty obvious guess that there must be some sort of causal relationship between that and this erotic fantasy, which is realistically going to be a variation in _male_ sexuality," you might end up saying something simpler like, "I want to be a woman." Or possibly even, "I _am_ a woman, on the inside, where it counts."