These two little boys were playing by a stream when they saw a lady bathing naked. So they're just watching her when all of a sudden one of the boys takes off running. The other boy takes off after him. When he catches up to the first boy he asks him, "Why did you take off running?" The other boy replies, "Well, my mother always told me if I ever saw a naked lady I would turn to stone, and I felt something getting hard so I ran."