I&#x27;m 35, American, middle class, Northeast of the country. I remember people in my early TEENS who thought you could not become pregnant from your first sexual experience, among other &quot;folk&quot; tales. It is, as you say, astounding. What makes it so absurd though, is that for decades it&#x27;s been a largely artificial state of ignorance enforced by people who forgot what it was like to be young.