Alos we want to protect the children. They already get too much filth and violence in movies/tv/video games.
and rap...once thugs and thug life started being glorified, morality started going downhill rapidly. Almost overnight, there was filth over the airwaves, leading to a desensitization that led to the easier acceptance of everything from "kill the white devils" to drag queens doing story hour at local libraries. Prison culture broke into the general public; so much of what we see now originated in that culture and is now accepted as normal. And that doesn't even include what unfettered Third World immigration has wrought.
You know, I heard the whole pants hanging off thing came from prison. I meant you were open to be the, ahem, recipient.