Angelina Jolie and Billy Bob Thornton
While the matchup between Angelina Jolie and Billy Bob Thornton seems strange on the surface, it couldn't hold a candle to the couple's strange actions. Married between 2000 and 2003, the Oscar-winners became known for their eccentric displays of affection, which reportedly included wearing vials of each other's blood around their necks. Thornton later clarified that the "vials" were, instead, two small lockets, each containing only a single drop of blood. Which makes it only slightly less creepy.