According to this year's widely reported sexting study, your teen is sexty sexting his/her way to a life of promiscuity. Of course, sexting is hardly the first thing that teen-sex-having has been pinned on. So it's our honor to present to you this timeline of historical causes of teen sex, all of which were at one point or another quite seriously alleged to have invented juvenile groping. Because juveniles would never figure these things out on their own.
See page 2 for sources.