Sex and the Single Girl is a 1964 American Technicolor comedy film directed by Richard Quine and starring Tony Curtis, Natalie Wood, Henry Fonda, Lauren Bacall and Mel Ferrer.

Bob Weston works for Stop, a tabloid magazine whose owner and staff are proud of being regarded as the filthiest rag in the United States.

Bob's friend and neighbor, stocking manufacturer Frank Broderick, is having marriage issues with his strong-willed wife Sylvia, but cannot find the time to go to a counselor.

After he fakes a suicide attempt, the two of them end up making out in her apartment, with Bob realizing he is actually falling for Helen, which is the reason he still has not written anything about her, prompting an ultimatum from his boss.

During the chase, while constantly changing places on the two cars and two cabs involved, and while eluding a zealous cop's attempts at stopping them, the three couples clarify their feelings for each other, and at the airport, Frank and Sylvia reconcile and depart for Fiji, Rudy and Gretchen console themselves with a trip together to Hawaii, and Helen forgives Bob, who has already found a new job with Dirt magazine, and the two of them fly to Las Vegas to marry.