In Gilbert and Sullivan's 'The Gondoliers', two men are placed in the difficult position of being married to three women, but none are sure who is married to whom. At one point, one character correctly surmises that that is two-thirds of a husband for each wife. However, later, in the song "Here is a Case Unprecedented", characters make reference to "bisected" husbands and "wives divisible into three." It should be the other way around.