Frank leads a respectable yuppie life working at a noted Stockholm law firm. He has also been married for eight years to his beautiful wife Nenne, who runs an upscale boutique. Yet Frank is deeply bored with his life and is supremely randy. He even fantasizes about the marriage counselor that he and Nenne visit weekly. Eventually, Frank shacks up with a young fetching art student named Sofia, though the experience wracks Frank with guilt. Meanwhile, Nenne's friend and co-worker Rosie suspects that Frank is having an affair, though she does not have the nerve to tell her. Little does Rosie suspect, however, that her friend is sleeping with her lover Georg, an uptight journalist with an ego the size of Finland. Soon wires get crossed, and all hell breaks loose.
Is Adult Behaviour… It's All in the Mind on Netflix? Yes! The movie Adult Behaviour… It's All in the Mind is now on Netflix in the countries listed below.
| Directing | Fredrik Lindström | Director |
| Directing | Felix Herngren | Director |
| Writing | Fredrik Lindström | Writer |
| Production | Johan von der Lancken | Location Manager |
| Art | Jan Olof Ågren | Production Design |
| Directing | Anna Carlsten | Script Supervisor |
| Costume & Make-Up | Karin Fahlén | Makeup Artist |
| Sound | Matti Bye | Original Music Composer |
| Editing | Jan Persson | Editor |
| Camera | Göran Hallberg | Director of Photography |
| Production | Waldemar Bergendahl | Producer |
| Directing | Kristina Kjellin | Assistant Director |
| Production | Jan Blomgren | Producer |
| Crew | Peter Bengtsson | Post Production Supervisor |
| Production | Kerstin Bonnier | Executive Producer |
| Costume & Make-Up | Lolo Murray | Costume Design |
| Production | Catti Edfeldt | Casting |
