It's an uber amazing way to go about teaching it isn't it
hell my first few sex ed's didn't even bother talking about STI's wasn't till year 10 when they started talking about normal STI's (not that we didn't know about them already but you know it would have been better to have the school tell us at an earlier age) I think AIDS/HIV cropped up in past as the "scare story" basically.
/ 
