The first two videos listed on PornHub.com are "FUCK THE CONDOM! Skinny Blonde Girl Opens HER LITTLE ASSHOLE FOR MY BIG COCK" and "2 Friends Want to Try an African Dick in the Ass for the First Time While They're Pissed On and Humiliated."

The First Amendment makes this kind of stuff borderline impossible to regulate in the US, but it's pretty obvious that this stuff is harmful to people's brains and that society would be better off it was not available to people (especially minors).