Blowing the whole 'rainbow party' concept out of the water, a recent study by the Guttmacher Institute found that most teens having oral sex were also going all the way.
The researchers found about 55 percent of the teens said they had engaged in oral sex but that this practice was far more common among those who also had engaged in vaginal sex. Teens said they began vaginal and oral sex at roughly the same time -- by six months after first vaginal intercourse, 82 percent had also engaged in oral sex, according to the study.
"There is a widespread belief that teens engage in nonvaginal forms of sex, especially oral sex, as a way to be sexually active while still claiming that, technically, they are virgins," Laura Lindberg of the Guttmacher Institute in New York, who led the study, said in a statement.
"However, our research shows that this supposed substitution of oral sex for vaginal sex is largely a myth. There is no good evidence that teens who have not had intercourse engage in oral sex with a series of partners."
No mention, as always, whether the oral sex went both ways. Now, that's a statistic we'd really be interested in.