On the surface, Gentlemen Prefer Blondes sounds like a delivery system for the tritest sexist jibes of midcentury movies: diamond-enthusiast Lorelei Lee (Marilyn Monroe) and her man-hungry best friend Dorothy Shaw (Jane Russell) take their cabaret act overseas, setting sail for Europe to teach a lesson to Lorelei’s fiancé. At sea, they’re surrounded by Olympic athletes and rich older men, temptations that could easily sink the women’s reputations and ambitions. Even the title suggests rivalry…