What citations are needed? This is obviously materially different than you finding some vhs that you can only watch at specific times when your parents aren't home. Children have unlimited access to every single type of pornography and can watch it whenever they are left alone in their room with a computer or phone.

edit: "Citations needed" is an extremely lazy way to respond to an argument that is extremely counterproductive and almost every time it's used it's done in bad faith to derail the conversation.