7 year study on Oxytocin: Female Pedophilia. Just something I picked out of a related study I conducted. Plug it into google. Oxytocin is a very interesting study of psychophysiology. Oxytocin is Freud's Survival Instinct, and what has perpetuated the human race. I have a thousand page documented manuscript on my study, stored somewhere. In the particular comment, the study used blood tests from females, hetero males and male pedophiles. The later experienced simular OT levels as the female. Females typically have more OT because it controls reproduction, birthing, suckling, and sex orgasms. Increase in male pedophiles is anyone's guess, but male gays have enlarged pituitary glands like females to produce and release the OT.
Here is a good place to start:
Orgasm - Vol. 21, Part 2 ( February 2008)