When I was...young...I was friends with another guy who lived across the street, and who was 4 years younger than me. I don't really remember how or why it happened, but we were horsing around and somehow we ended up with his face in my crotch...so he bit me. (We were both fully clothed.) My initial instinct was to pull away, but he wasn't biting hard and it felt kinda good, so I decided to go with it and see how far it went. The fun didn't last long before two things happened, more or less simulaneously--my mother caught us (damn her timing) and he really bit me. Even though he was biting through clothing, I had bloody tooth marks on my scrotum!