The study - based on computer surveys given to over 6,000 teens - also looked at the timing of first oral sex in relation to the timing of first vaginal intercourse. It found that the prevalence of having oral sex before vaginal intercourse was about the same as those having vaginal intercourse before oral sex.
"This new CDC analysis debunks many myths about when young people are initiating oral sex," wrote Leslie Kantor, vice president for education at Planned Parenthood, a family planning advocacy group. "Although there has never been data to support it, there has been the perception that many teens engage in oral sex as a 'risk-free' alternative to intercourse. But the CDC analysis shows that sexually active young people are likely to engage in both activities," she wrote.
But oral sex, like vaginal intercourse, is not risk-free. According to the CDC's website, "numerous studies have demonstrated that oral sex can result in the transmission of HIV and other sexually transmitted disease," not the least of which is Human Papillomavirus (HPV), the disease known to cause both cervical and some throat cancers.
Image: Teenage couple, via Shutterstock