Fred, George, Doug and Howie are quickly reaching middle-age. Three of them are married, only Fred is still a bachelor. They want something different than their ordinary marriages, children and TV-dinners. In secret, they get themselves an apartment with a beautiful young woman, Kathy, for romantic rendezvous. But Kathy does not tell them that she is a sociology student researching the sexual life of the white middle-class male.

The Willards from Terre Haute, Indiana travels abroad for the once-in-a-lifetime vacation in Paris, France. Harry Willard believes that the greatest problem will be avoiding tap water, but bringing his three children will prove to be more troublesome

A scientist discovers a formula that makes a baseball which is repelled by wood. He promptly sets out to exploit his discovery.

A middle-aged genius goes to college for the first time.

The eccentric Bullock household again need a new butler. Daughter Irene encounters bedraggled Godfrey Godfrey at the docks and, fancying him and noticing his obviously good manners, gets him the job. He proves a great success, but keeps his past to himself. When an old flame turns up Irene's sister Cordelia starts making waves.