TED captions this NSFW talk:
At TED2009, audience member Cindy Gallop gave a 4-minute presentation that became one of the event's most talked about. Speaking from her personal experience, she argued that hardcore pornography had distorted the way a generation of young men think about sex, and talked about how she was fighting back with the launch of a website to correct the myths being propagated.
Gallop also points to several stats compiled by Michael Castleman. Money quote:
Why would social ills decline as porn becomes more widely available? No one knows. But the one thing porn really causes is masturbation. Internet porn keeps men at home one-handing it. As a result, they're not out in the world acting irresponsibly – or criminally.