It's not a law that you have to post a selfie before, during, and after every activity. But for kids, it's pretty much mandatory.
원문출처 : http://www.cnn.com/2017/01/12/health/girls-social-media-self-image-partner/index.html
원문출처 : http://www.cnn.com/2017/01/12/health/girls-social-media-self-image-partner/index.html