Replace 'porn' with Wall Street, politics, institutionalized religion, professional sports, etc. and the case could be just as strong. There are many fields of

Replace 'porn' with Wall Street, politics, institutionalized religion, professional sports, etc. and the case could be just as strong. There are many fields of human endeavor and modern society which are built around the idea of taking some natural tendency or desire we have, then leveraging it for private profit, even encouraging an unhealthy degree or type of expression of it. It's not limited to porn with regards to sex.