That's the reason. If you make something "illegal( or immoral)" then you can make enormous profits off of it. If you really want to stop people from wanting porn, just flood them with images of "real" naked people. There is nothing like a nudist colony to "turn you off". :-) But they are selling an "illusory image" in the porn world, of beautiful,lean, airbrushed bodies, which you would never see in reality. But in order for that illusion to be effective, it has to be made shameful, so no one publicly talks about it, and keeps it locked up in their own private fantasies. It's the perfect situation for "mind control"...and just look how it is used. Show a beer commercial to guys, with a couple of topless buleimic women in it, and you have instant "customer gratification". Now this wouldn't happen, if the men were flooded with actual images of real topless women, of all ages. And of course, it goes the other way, the average skinny legged, pot-bellied man is not your typical woman's fantasy.

This society is going to have a hard time breaking out of this cycle, because the women know that they control men only by sex, so even though they espouse feminist ideals, they still use make up and wear suggestive clothing. The whole marriage game is based on this.