What about the fact that you, as a parent, are essentially saying okay to premarital sex. If you stress to your child that it is a bad idea for MANY reasons- the STD's out there, and now the risk of getting cancer- then they can make their own choices, but make them wisely. If they don't, then their decisions will affect them the rest of their lives. When she's finally ready to get married, if she's been sleeping around when she was a teenager, then it's her turn to tell her husband-to-be why she's got herpes. Not a nice conversation. I think all vaccinations such as these give the message that it's okay to have sex with someone you aren't going to marry, or that you don't know very well. If you date someone for a year or two before you have sex, you're eventually going to find out if they've had sex before. If he has, he could have gotten HPV, if he hasn't, theres no way he has it, and the girl is safe.