Since 1972 and the release of Deep Throat , the business of making commercial hardcore feature films has grown dramatically. Thousands of films are produced every year. Yet for the most part the industry remains a mysterious commodity, with the people behind it still seen as unscrupulous, vaguely threatening figures. Now the record is put straight with The X Factory, an eye-opening trip into adult feature films courtesy of interviews, on-the-set reports and a visit to the World's Biggest Gang Bang 2. "The best peep-show coverage of the porn-video business."- Screw