Parents, if your teen has a cell phone, there's a good chance they know someone who has "sexted."
They may have even sent a sexually explicit text message or picture themselves.
Researchers found, of those with access to a cellphone, 15 percent engaged in sexting, and 54 percent said they knew someone who sent a "sext."
But teens who had sexted were more likely to report being sexually active, and were more likely to have had unprotected sex, compared to those who did not sext.
University of Southern California researchers studied the "sexting" habits of more than 1,800 Los Angeles high school students for the study.
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