When I was in primary school (Australia, ages 5-11ish) I saw a huge bunch of guys moving in a group around the playground... turns out they were following a girl who was flashing her chest at them. There must have been at least 50 guys following her in the hope that she would sit down and lift her top again. She was obviously enjoying the attention - I wonder whatever happened to her.
(from memory she didn't have much - 10 year old girls back in the mid 80s didn't, but nevertheless we were mesmerised)