Sex and violence have been part of films right from the start. Guns were brandished in the first widely-viewed movie, The Great Train Robbery. Jean Harlow, Bette Davis, and Barbara Stanwyck are a few of the stars whose early roles, while modest by today's standards, garnered backlash from critics and the public alike. Here is the history of Hollywood's notorious Production Code, the film industry's attempts at self-regulation, and the development...