Are there asexuals among us? On the possibility of a "fourth" sexual orientation
Gay people are often asked by the curious: When did you first realize you were gay?” In my case, I remember undressing my Superman doll--and being terribly disappointed at the result--as well as being motivated to befriend the more attractive boys in third grade. But hormonally speaking, it wasn’t until I was about fourteen that I first looked in the mirror and thought to myself, ah, that’s what I am all right, it all makes perfect sense now.
Bering in Mind: Scientific American Blogs