If you take a naked picture of yourself and send it to someone’s mobile phone, email or social networking website, you lose control of it. On the other hand, if you take an erotic picture of someone else, make sure to have that person’s consent and be aware of the implications that could occur if the picture is lost or stolen. Having someone’s permission to take his or her photograph doesn’t mean you have the right to disseminate it!
So first message in sexting prevention is: Do not support its creation in any way.