The Parents Music Resource Center (PMRC) was an American committee formed in 1985 with the stated goal of increasing parental control over the access of children to music deemed to be violent, have drug use or be sexual via labeling and censorship. The committee was founded by four women: Tipper Gore, wife of Senator and later Vice President Al Gore; Susan Baker, wife of Treasury Secretary James Baker; Pam Howar, wife of Washington realtor Raymond Howar; and Sally Nevius, wife of former Washington City Council Chairman John Nevius. They were known as the "Washington wives" -- a reference to their husbands' connections with government in the Washington, D.C. area. In August 1985, 19 record companies agreed to put "Parental Guidance: Explicit Lyrics" labels on albums to warn of explicit lyrical content. Before the labels could be put into place, the Senate agreed to hold a hearing on so-called "porn rock". This began on September 19, 1985, when representatives from the PMRC, three musicians -- Dee Snider, Frank Zappa, John Denver -- and Senators Paula Hawkins and Al Gore testified before the Senate Commerce, Science and Transportation Committee on "the subject of the content of certain sound recordings and suggestions that recording packages be labeled to provide a warning to prospective purchasers of sexually explicit or other potentially offensive content." During his statement, musician and producer Frank Zappa asserted that "the PMRC proposal is an ill-conceived piece of nonsense which fails to deliver any real benefits to children, infringes the civil liberties of people who are not children, and promises to keep the courts busy for years dealing with the interpretation and enforcement problems inherent in the proposal's design."
(source: en.wikipedia.org/wiki/PMRC)