It goes like this: horny teenagers have always been horny. Then they got cellphones, and used them to exchange raunchy pics with each other. Horrified parents demanded an explanation, and "sexting" was born. But what does that mean, exactly? This.
"Sexting" has become as nebulous as it is overhyped. And this is problematic, because the definitions in use are as ambiguous as they are many. Some say a sext is just a naked pic. Some say it's flirty. Some say it's sexually-suggestive or sexually themed. "Sexually-themed" being one of those wonderfully American catch-all danger words. It can be kissing! It can be nudity! It can be—sex. Is saying "I wanna make out with you" a sext? What if I include a picture of my penis with that message? What if it's just the picture?