"Since 1956, sex education has been compulsory in Swedish schools, from the earliest grades through high school. Sex is a natural human act, the educators reason, and most people become active before they're 20. Since there is no changing that, the Swedes figure, young people should at least understand sexuality and reproduction, as well as the risks of unprotected sex. "The idea is that no one gets hurt, and no one is having unwanted children," says Swedish sociologist Bo Lewin." (thanks Toufic)