Marx Brothers fans have been known to mud-wrestle over which of the brothers' films was the best but if you say their worst was the 1949 Love Happy, I doubt anyone will challenge you to a duel. Its 85 minutes don't get much better than this one minute featuring but one Marx Brother and a then-unknown Marilyn Monroe. Note that by this stage in his career, Groucho had abandoned his famous greasepaint mustache and grown a real one…