Um... A cause??? Not really sure that science has figured that one out. Lots of theories, but there really isn't any kind of tipping point where I suddenly "became" a cross-dresser. I was aware of being this way long before I can even really remember anything else. I struggled with it for most of my life and made lots and lots of stupid mistakes along the way, but I have always been this. What's more, I'm not really sure that knowing a "cause" would influence me in any particular way - I am not a victim of anything, I am who I am and I am fine with being me - that is really the best one can hope for, to be at peace with one's own self.