I was talking to Redpepper about this thread earlier. She asked me if I was going to comment and, at first I said no as I felt I had spoken at great length about this on another thread http://www.polyamory.com/forum/showthread.php?t=493
I will make another comment on this though, short and to the point. There have been three different types of sex in my life. One that involved wanting to experience new things but not necessarily new people. One that involved casual sex out of a desire to replace the function of my hand with the body parts of a woman. And one that became a form of communication with the person I love.
There is nothing sexually denied to me, so the first one is not an issue. The second one is not a part of my life; if I want to masturbate I'll use my hand, not the borrowed body parts of a human being. The third is where I find satisfaction and purpose to sex.