Ahh yes, I remember those lessons. I go to an all-girls school (yaaaaaaaaaay) and my teacher fer it was a male, and he was discussing periods and stuff (I think we'd know a little more than he does..) and people asked him these ultra-awkward questions. xD Also, being at a catholic school, there were times where he'd go, "uhhh, I can't aswer THAT question..." lol.