Well playing devil's advocate, a lot of porn IS evil. It's not just procreation, it's violent, misogynistic, garbage. This is another topic altogether though and I'm not sure exactly how it fits with the topic I raised.
It has nothing to do with your topic per se other than to question and wonder how its ok to watch violent death and not sex. Your post brought this to my mind. I have heard people say that some extremely violent movies are entertaining yet extreme nudity within a movie is apparently disgusting. Im Simply illustrating a bigger point. Its not just about kids though that is considerably more messed up.
As Mike explains that much is done to protect a child in such a movie one has to ask the question why....why do people watch, and its because people do watch that these movies continue to be made. They make money.
Sorry for the side chain but you have brought up a very sensitive topic for me.