History of the Parental Advisory Explicit Content sign I believe that many people noticed this sign on the covers of the albums or singles of their favorite artists, and everybody knows what it means, yet a few know its history. In the 80s, a woman, Tipper Gore-her name will be mentioned later-bought her daughter Karenna an album of the artist Prince "Purple Rain", but then having heard the content of the singer's lyrics, she was extremely unhappy because it mentioned "masturbation". So, in 1...