I'd still call it prudery and hypocrisy. I don't know a single 13 year old who wouldn't know what that term means. In Germany, where it is not forbidden to talk about things being natural as eating, guess what - teenage pregnancy is a zero issue. Take the US in contrast, where children are "protected" by censoring their language, it's the opposite.
Children don't go ******* around just because you tell them how babies are made. Tell them that adults do this when they are old enough and then go out and continue playing ball with them. Everything is fine. Censorship is lying to your kids.