My wife used to teach health education at a couple of different schools in our area, and some of the stories she'd come home with were absolutely hilarious. That said, it's definitely always better that these questions get answered - no matter how dumb they are - rather than allow the ignorance behind them to go unchecked. The way I see it, the more we all know about sex, the better we'll all (hopefully) be at it and maybe the world will be a slightly happier place that way.