In fifth (or possibly sixth) grade, when I was eleven (or possibly twelve), after we had had gym class, the other guys had found a hole in the wall that led to the girls' shower room. All the guys in the class watched, but I did not because I knew it was immoral. They were found out, at least, though, and they all got detention, except me. I still am so sickened by this, but at least there weren't any camera mobiles, then. :/
This was the day I truly understood that it is *me* and it is *them*... that I am nothing like the rest.
EDIT: Maybe I should've posted this in the "Post a random truth about yourself" thread... this is hardly trivial, and weird isn't really the right word, either, but I guess most guys out there indeed *would* find it to be weird...