I don't know why everyone is so shocked at the idea of a 13 year old having sex. God knows, they do it every day in the inner city. It was done in the middle ages. It's still done in many places. There are a lot of people from the southern United States whose grandmothers (or greatgrandmothers) were married at age 13, 14 or 15. If nature didn't want 13 year olds to get pregnant it wouldn't have made girls fertile at that age. Ariel Durant got married to the historian Will Durant at age 15. She skated to the wedding on roller skates.