Eric Soya's '17' (1965)

In the summer of 1913, 17-year-old Jacob (Ole Soltoft), a Danish high school student, lives in the frustrating limbo between boyhood and manhood. He worries about his excessive focus on masturbation and, although he is aware of the sexual overtures by the housemaid Sophie (Lise Rosendahl), he doesn't know how to respond to her. He is invited to spend his vacation at the summer house of his wealthy uncle (Ole Monty). At the summer house in an idyllic coastal town, he meets his uncle, aunt (Bodil Steen), free-spirited housemaid Hansigne (Susanne Heinrich), virginal housekeeper Rosegod (Lily Broberg), and his dream-girl cousin Vibeke (Ghita Nørby). He is also pursued by his uncle's employee (Ingolf David), who tries to seduce him. While the uncle is off on a fishing trip and the aunt spends the night in town with her lover, He has his first sexual experience with Vibeke-an awkward encounter. Afterwards, when Vibeke leaves for school, he spends his nights with Hansigne-a joyful, uncomplicated and liberated woman. She guides him through his awkwardness and teaches him erotic techniques. One night, Hansigne's boyfriend Knud (Hugo Herrestrup) catches them together and attacks and threatens him. He finally discovers he feels like a man. In great spirits, he returns home after vacation and prepares to accept the advances of Sophie.