Live sex charts
Among the 1,285 Los Angeles students aged 10 to 15 surveyed for the study, 20% reported having received at least one sext, while 5% reported having sent at least one sext.
The survey showed that those who reported receiving a sext, were six times more likely to report being sexually active than teens who hadn't received a sext.
But in some people HPV leads to genital warts and cancers – notably, cervical cancer.
The vaccines Gardasil and Cervarix were designed as a prevention for young women who have not yet been exposed to HPV.
In the statement, an update from their 2001 position, the pediatricians' organization recommends removing restrictions and barriers that often prevent teens from accessing condoms.
Parents should be talking to their teens about sex, the doctors say, and pediatricians can help.