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.
| Sound | Frank De Vol | Music |
| Costume & Make-Up | Elizabeth Courtney | Costume Design |
| Writing | Ira Wallach | Screenplay |
| Art | Hans Peters | Art Direction |
| Art | Jerry Wunderlich | Set Decoration |
| Directing | Michael Gordon | Director |
| Art | George W. Davis | Art Direction |
| Editing | Tom McAdoo | Editor |
| Art | Henry Grace | Set Decoration |
| Camera | Arthur E. Arling | Director of Photography |
| Costume & Make-Up | Bill Thomas | Co-Costume Designer |
| Production | James C. Pratt | Producer |
| Production | Joseph E. Levine | Executive Producer |
| Sound | Franklin Milton | Recording Supervision |
| Production | Martin Ransohoff | Producer |
| Costume & Make-Up | William Tuttle | Makeup Artist |
| Costume & Make-Up | Mary Keats | Hairstylist |
| Costume & Make-Up | Kim Novak | Co-Costume Designer |
| Writing | Marvin Worth | Story |
| Writing | Arne Sultan | Story |
