Why You Lose at Bridge is a book about the game of contract bridge by the Russian-born English bridge player S. J. "Skid" Simon (1904–48), first published in 1945. It contains practical advice directed mainly towards rubber bridge players, and introduces to the world four stereotypical bad players: Mr Smug, the Unlucky Expert, Mrs Guggenheim, and Futile Willie. It has been much admired by duplicate bridge players as well as by rubber bridge players, and Simon's fictional characters have passed into legend.