In theory the "let parents teach kids about sex" idea sounds good, but a lot of (maybe even most) parents won't talk about it, then you're left with kids not being taught anything. If you can't see the danger for society in that...
What I find even funnier is that Bush mandated that a good portion of his African AIDS Emergency Fund go to abstinence only programs; even to the point of banning handing out condoms and condom information. Sorry, but you're not going to convince a buncha people in 3rd world countries to stop fukcing.