The post-World War I era led to womens' right to vote, and certain actresses of the silver screen were tsking liberties in films in the late 20's until 1934. The advent of sound provided audiences the benefit of recorded music and dialogue. The devastating revelations of the Roscoe Arbuckle and Wallace Reid pecadilloes launched the establishment of the Hays Office, which curtailed markedly what material could be depicted, and studios walked on egg shells, lest they run afoul of this oversight group. Jack Warner cautioned directors to mind the mammaries of Joan Blondell, a note of caution previously unnecessary prior to the strictured edicts of Hays and company.