Perhaps that is the most difficult truth of all for a sissy. The more we become the girl that we want to be, the less we are able to fill this need for our female partners. As my femininity grows my desire is to be the woman, not the man. Oral service to her is the pinnacle. i want my mouth to be filled with cock. Entering her is to fill her needs not mine. And i am not as good at it as i once was. It is easy to understand why a woman will always choose this and why a sissy it less and less able to play this role.