All vaccination is now heavily politicized in the US. HPV vaccination was an obvious focal point initially because of why we'd do it when we do.

The initial data says you should vaccinate somewhere around 12-14 year old girls because most of them will be HPV naive but if you wait longer they won't be any more. But too many US parents cannot imagine their little girl ever having sex and if they never have sex they almost certainly won't contract HPV so, why are we vaccinating them? Are you trying to make my daughter a slut?

If you've been a teenage American this should strike you as very silly, and doubly so if you understand biology. Teenage girls are not, in fact, celibate by default, so some of them will get horny. And if you understand biology the viral infections aren't caused by the same mechanism as pregnancy "sexual activity" is a shorthand, you can easily get infected while steering clear of anything that would get somebody knocked up. A peck on grandma's cheek is unlikely to work, but if you're sucking face for most of a Stranger Things episode that's definitely enough that you might contract HPV.