HOW cool are those Gardasil Girls? Riding horses, flinging softballs, bashing away on drum sets: on the television commercials, they are pugnacious and utterly winning. They want to be “One Less,” they chant  one less victim of cervical cancer. Get vaccinated with Gardasil, they urge their sisters. Protect yourselves against the human papillomavirus, or H.P.V., which causes cervical cancer.

But someone’s missing from this grrlpower tableau.

Ah, that would be Gardasil Boy.

Gardasil Girl’s cancer-related virus? Sexually transmitted. She almost certainly got it from him.

So far, Gardasil is approved just for girls. They can be vaccinated when they are as young as 9, although it’s recommended for 11- and 12-year-olds, before they are sexually active.

As the commercials show, the pitch to Gardasil Girl’s parents doesn’t need to address sex: it’s about protecting their daughter from a cancer.