Robert Morse is an authority on adultery; he takes an innocent protege (Walter Matthau) under his wing and teaches him the ropes. It's hilarious...and tastefully done. A host of comic talents (Lucille Ball, Art Carney, Sid Caesar, Joey Bishop, Jack Benny, Terry-Thomas, Phil Silvers, Carl Reiner and many more) make brief appearances; that and Morse and Matthau's humorous banter are good reasons to see this film. Gene Kelly directed.