Divine and Crackers

John Waters' 1972 exploitation comedy movie Pink Flamingo features one of the funniest incestuous relationships due to the level of its absurdity. Divine, a drag queen criminal on the run was challenged by another couple criminal to the title of "the filthiest person alive." Her response surely won the title, as she and her son Crackers went to the Marble's residence and licked and rubbed the furniture. The activity excited them so much to the point that Divine fellates her son. The film was banned in some countries.