“Though many strive to hide their human libidinousness from themselves and each other, being a force of nature, it breaks through. Lots of uptight, proper Americans were scandalized by the way Elvis moved his hips when he sang "rock and roll." But how many realized what the phrase rock and roll meant? Cultural historian Michael Ventura, investigating the roots of African-American music, found that rock 'n' roll was a term that originated in the juke joints of the South. Long in use by the time Elvis appeared, Ventura explains the phrase "hadn't meant the name of a music, it meant 'to fuck.' 'Rock,' by itself, has pretty much meant that, in those circles, since the twenties at least." By the mid-1950s, when the phrase was becoming widely used in mainstream culture, Ventura says the disc jockeys "either didn't know what they were saying or were too sly to admit what they knew.”