Gift (1966) - IMDb
Gift: Directed by Knud Leif Thomsen. With Søren Strømberg, Sisse Reingaard, Poul Reichhardt, Astrid Villaume. An amoral young man is invited to the ordinary family house where he seduces the daughter and tries to seduce the mother but is thrashed and thrown out.
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porn watch
found on ancensored.com, one of the first danish mainstream films with unsimulated sex scenes