What if, in a parallel universe, the woman you become is actually a FtM crossdresser and you and she (in reality the same person) can only swap roles for a specific period?
This could explain how, I am almost magnetically, drawn to crossdressing whereas at other times the desire is not that strong - perhaps she has the desire to dress and that draws me in...
Sorry if this seems off topic...it ran through my mind reading the first post
