A recent study by the Archives of Pediatrics and Adolescent Medicine surveyed nearly 1,000 students at seven public high schools in southeast Texas, and found that nearly 30% were sending nude pictures of themselves through email or text messages, higher than previous reports:
http://www.redorbit.com/news/health/1112649806/30-percent-of-teens-are-sexting/
http://www.kwqc.com/story/18940239/study-nearly-30-of-us-teenagers-are-sexting
http://techcrunch.com/2012/07/06/teenage-sexting-is-becoming-the-norm/
And in a new study, the L.A. teenagers who had sent racy texts were seven times more likely to be sexually active than those who said they’d never sexted: