Similar things can be said about alcohol, nicotine, driving a car, etc., but society recognizes that not all parents are responsible enough to make those decisions and have put up laws to protect the broader interests of society. It would be great if all parents could have a conservation about the harm that pornographty consumption has on development, but the fact that most fathers can’t even talk to their daughter about their periods (or mothers about their son’s problems) tells me that this probably isn’t going to happen.