I don't know how to say this delicately, but I once had a girl ask me if she could get pregnant by having, um, backdoor? sex. I was helping in a health class at the time and just stared at the girl for a minute before I could answer. I then told the teacher we needed to go back over basic anatomy, because some obviously weren't listening.
I also pointed out to her that any sex was dangerous if condoms weren't used, especially the type she was talking about. Seriously, people, teach your kids at least the basics of anatomy and safety, even if it is to point out physical dangers of unprotected sex.
