Anything can be harmful. Is pornography intrinsically toxic, like a tall glass of mercury? No, however it Can Be. If it's abused, I grew up with Family Touch, my father left out in a continuing campaign of Covert Incest (Sexual harassment by a family member) So, yes. It can, in fact be harmful. Just like anything, too much Oxygen can kill you, a hell of a lot faster than drinking yourself to death, lung cancer from smoking, or overeating sugar can contribute to Type 2 diabetes.