From 8-year old Hilda’s diary:

The commandment we learned this morning is a really new one. No one in the class heard of it before. It is the seventh one. “Thou Shalt Not Commit Adultery.” But Miss Meadows says that it is a commandment we don’t have to think much about right now because we will not do it until we are grown up. Only grown-ups do it, when they are adults, and that’s why they call it adultery.