Meanwhile, children and young people can contact Childline free, 24 hours a day on 0800 1111 or get help at.
Snapchat is probably the best app out there right now, closely tied with Instagram.
The girls snapped the photos of themselves naked, and sent them to a boy they know via Snapchat.
It was a unique, delicate situation that required discretion.
I hope that has got your attention because it certainly has for me this week.
The Sports Illustrated model was getting a spray tan on Snapchat when she had an accidental nip slip — giving her millions of followers a look at her nipple.