roue

roue - noun - a man devoted to a life of sensual pleasure; a debauchee; a rake

Caligula comes to mind as a prominent example of this word. He is well known as the emperor who would invite his friends and their wives to dinner then, in the middle of the meal, take a friends wife and have sex with her. After having sex with her, Caligula would return to the table to finish his meal and extol or deride the woman's sexual behaviors to her husband.