About the Film
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.
✨ The Watchlist Wizard Verdict
The Vibe: Adult Behaviour… It's All in the Mind is a lighthearted, hilarious, and uplifting comedy movie from 1999. Directed by Felix Herngren, and starring Felix Herngren, Karin Bjurström, Cecilia Ljung Frank leads a respectable yuppie life working at a noted Stockholm law firm.
Fan Reception: While holding a polarized score of 5.6/10, Adult Behaviour… It's All in the Mind retains a dedicated audience who appreciate its unique premise and stylistic choices.
Who Should Watch It: Highly recommended for those looking for a fun, stress-relieving watch. If you enjoy movies, Adult Behaviour… It's All in the Mind deserves a spot on your watchlist.
Production Specs
Top Billed Cast
Actors Also In

Felix Herngren
Notable Career Works
2006

2022

2001

2003

Karin Bjurström
Notable Career Works
2015

1996

2012

2003
© 2026 WATCHLIST WIZARD • DATA SYNCED VIA TMDB & WATCHMODE






