I'm 25 now and have never told this. When I was 11 I was spending the night at a freind's house. They had to leave for a while to visit his grandmother. I was alone. I saw his mother's bed and decided to lay on it and masturbate. There was a pair of her panties on the bed and I smelled them and it got me excited. I masturbated and "finished" quickly. As I finished I felt the bed move and realized my friend's mother had walked in the room and saw the whole thing. She sat on the bed and calmly said, Don't worry, all little boys do that but this is the first time I have seen it. I won't tell anyone so don't worry." I was so embarrassed. To this day I guess she never told anyone and has never mentioned it again although I have seen her many times since then.