'I Saw Your Willy' Ad Warns Kids About Sexting

A British charity is attempting to warn children about the dangers of sending naked photos online with a startling, animated video: "I Saw Your Willy."

The video centers around a kid named "Alex," who sends a picture of his penis to a girl via SnapChat. He believes the photo will disappear shortly, as photos are supposed to do on SnapChat. But he's in for a surprise.

Instead, the girl records a screenshot of the image and sends it to her friends. They, in turn, send it to their friends. In the end, Alex is bombarded by strangers saying, "I saw your willy."

The repercussions don't stop there. A school bully threatens Alex and a strange man tries to get to know him better.

The National Society for the Prevention of Cruelty to Children released the video on Friday as part of its Share Aware campaign, which is designed to let kids know that even private photos can easily become public.

"We tell our children to share, but online it's different. In fact, sometimes sharing online can be dangerous. That's why we're asking parents to be Share Aware and keep children safe online," the charity said on the campaign's website.