30 years ago today, MTV started airing in the United States. It’s gone through plenty of changes in its three decades—from VJs to Jersey Shore, from Yo! MTV Raps to TRL, from The Real World to, um, The Hills (i.e. "the completely unreal world"), from all music videos to very few music videos. However, one thing has stayed the same: your mom still doesn’t want you to watch it …
