The early years of sound were one of the most liberated periods in Hollywood history. Harlow, Stanwyck and Mae West lost their virtue and liked it. But in 1933 a Production Code introduced the four-second kiss and twin beds. Censorship would remain in place for more than three decades, although attempts were made to break the ban with films like The Outlaw and The Pawnbroker. The swinging 60s saw censorship in retreat, and sex was treated more frankly than ever before. Nudity became de rigueur.