You know, now that you mention it, the doctor might have a quota of sorts. It's a brand new vaccine, and maybe if enough people get it it will help with the insurance aspect, by showing the demand? There was a lot of political opposition to it (conservatives said it would give kids a mandate to have premarital sex, like a) having sex after marriage means you won't get an STI and b) kids who up until now didn't even know you could get HPV for the most part will have sex without thinking about HIV and other STI's).