I come from a very strict fundamentalist background where sex was not discussed in the house, giving rise to a lot of misconceptions and misinformation.
Since I was about nine years old, I found that I have been aroused during fun fights, both boxing and wrestling with my friends. I would get hard but didn't know why. I thought all kids did and indeed many of my opponents confessed to having a boner when we would wrestle. I recall one Sunday morning when I was about ten wrestling in my friend Mike's room on his bed. He was in his tighty whities since he had just got back from church and was changing when we started wrestling on the bed. After about ten minutes of grinding I yelled for him to get off since it felt like my cock was about to explode. I was really scared and had no idea what was going on.
Entering into puberty, my dreams seemed to be of two types fighting with boys and swimming with girls. One warm summer evening I was in bed with nothing but slick polyester pyjama bottoms on. I was thinking about wrestling shirtless with Jerry when all of a sudden I got real hard. I started humping the pillow as I thought about our fight, all of a sudden my dick exploded. I had no idea what was going on, but discovered that my pyjamas were covered with a white sticky substance that had come out of my penis. I had no idea what it was. I was naive. While I was real scared, boy did it feel great.
For the rest of the summer I had lots of fantasy fights. I found myself going to the library and checking out books on boxing and wrestling to get aroused at some of the pictures. These became my visual stimulation. After a while I confided in Jerry what had happened, but that's another story. Even to this day, while lots of stuff gets me aroused, both male and female, I still get the biggest kick out of boxing and wrestling.