Certain states have laws specific to sexting between minors. Between consenting adults, the private sharing of nude or suggestive photos is generally not illegal.
These laws make the penalties for teen sexting less severe than if an adult would send similar photos to an under-age person. To get state specific details.
Sexting is sending, receiving, or forwarding sexually explicit messages, photographs, Young adults use the medium of the text message much more than any other new media to transmit messages of a Mass media does not encourage teen or underage sexting, because of the child pornography laws they could violate.