The Erotic Engine: How Pornography has Powered Mass Communication from Gutenberg to GoogleFrom cave painting to photography to the internet, pornography has always been at the cutting edge in adopting and exploiting new developments in mass communication. And in so doing, it has helped to promote and propel those developments in ways that are rarely acknowledged. Without pornography, the internet would not have grown so quickly. The e commerce payment systems that are now commonplace would be at a far more primitive stage in security and