They All Do It (1968)

Johannes is a shy and inexperienced young student at the music conservatory. He is a Mozart admirer and in love with his fellow student Elisabeth, who also seems interested in him. The chic and modern Herbert, called Pop, has been held at the conservatory and lives as a jazz musician and skier hunter. He bets with Johannes that he can go to bed with Elisabeth by noon. 20 same day when all girls are alike.