Sexting is creating pictures or videos of sexual acts or nudity and texting it over cell phones. One resource I read called it 'the intersection of promiscuity and technology.' This is happening with and without a teen’s permission. A survey released in December by the National Campaign to Prevent Teen and Unplanned Pregnancy said about a third of teenage boys and a quarter of teen girls say they've seen nude or semi-nude images that were meant originally to be private.
Parents can prevent sexting:
Parents can prevent sexting the very same way you handle it for any media, you talk to your teen about the tough issue and follow it up by taking steps to build strong family bonds. Read more in this article, Keep Your Teen From Becoming an Online Porn Star.
Sexting is a crime, but:
At this point, authorities are trying to figure out what crime to charge teens with when caught up in a sexting situation. The crime itself, if committed by an adult, would be child pornography. That is a federal offense that doesn’t really cover the issue here.