4th grade. Down the street at a friend's house. His older brother wants to play a game in the camper. The friend has to do dishes. The brother and I go to the camper to play. He starts saying something about how some games are more fun without clothes.
I immediately left and called my dad. Never told my dad why I needed to be picked up.
Years later, after high school, he was arrested for being a pedophile. Scary shit.