It seems to me that, although I'll allow for exceptions, one cross dresses because of an inner desire to emulate...or more honestly...an inner desire to be a woman. Its hard for any of us, raised as we usually are, to acknowledge that inner need/desire to ourselves. So, its not a great surprise that once we begin to explore and express this part of ourselve, we also become open to the possibility that its more than just the clothes. I know its true in may case and it seems to be a common experience.