You thought putting your teenage kid on a family plan was a good idea, right? Probably not, if a new study published in Pediatrics is any indication.

A poll of 1,800 Los Angeles teenagers reveals that kids who spend time sexting on their cell phones are seven times more likely to be having sex in real life.

"There is peer pressure around sexting," said Eric Rice, assistant professor at the University of Southern California, who lead the research. "Sexting is still a minority activity... [but] there is an emerging sense of normalcy around sexting behavior. If you have friends that sext, you are 17 times more likely to sext."

Think twice about getting your kid a cell phone. Well, err, unless you want them having sex.

[via Los Angeles Times]