I'd like to preface my post by saying that acting out on pedophilia with a child is not something I support. There are many people who through no fault of their own have this sexual orientation and never act on it.
I think my particular situation could be linked to a couple of childhood experiences. When I was 8 or 9 my best friend, also a boy, became very interested in sex. It started off with him asking me to show him my penis. After several instances of "I'll show you mine if you show me yours" he started wanting to do more. He introduced me to basically every kind of sex act. He told me that if we lay in opposite directions and suck each other it's called a "69". I don't remember what he called anal sex but that is also something we did often. We had sex almost everyday for about a year. Looking back on it all now I can say with almost certainty that he must have been being molested. He just knew too much for a 9yo and too much terminology and this was just before the age of the internet.
I was raised in a strict Catholic family and I really felt terrible guilt about what we were doing. While we were doing it I think I felt excited, not really sexually, but rather like the type of rush you'd get from stealing. But then, when I was alone in bed, I'd often cry myself to sleep thinking about what we had done. I was totally sure that I was going to go to hell. I kept making resolutions to never let it happen again. But it did. Almost everyday he'd come over and we'd lock ourselves in the basement bathroom for an hour. I can distinctly remember one time when he called me to ask to play I said "Ok you can come over...but lets not play THAT ONE game!" I couldn't handle the guilt anymore.
It ended. But then about a year later my mother came to me and asked if me and this friend had been doing strange things. "Like what?" "Was it sucking penises?" my mom asked. I broke down crying and said that it happened "but it was his idea!" As if that mattered. Apparently he had been doing the same thing with about 5 other boys in the neighborhood for quite some time. Some mother caught them and the other boy spilled the beans. So I think that experience is the main reason I ended up becoming a pedophile. Something about the first sexual experience mixed with the guilt and shame has stuck with me and formed my sexual orientation.
The other thing I think could have played a part into my development as a pedophile is my very small penis. Now, perhaps this is just coincidental, but I happen to be quite small down there. Especially when I'm flacid it's like the size of a human thumb. When erect it's a tiny bit less than 5 inches. I agonized about this growing up. I remember thinking when I was about 13 that I would probably have to use a dildo if I ever had a wife. There was no other way she could ever be satisfied. It was around this time of 12 or 13 that I started feeling intense attractions for boys that have lasted to this day. I think the childhood sex and guilt and the adolescent total lack of confidence in my ability to please a woman turned me into a pedophile.