Make Love, Not War(1966)

Non faccio la guerra, faccio l'amore

Twenty years after the end of the war, a German submarine has not yet surrendered and continues to wander the seas. Its travelers include a half-witted officer, a meager and dazed crew, and Ombrina, a girl rescued from a shipwreck when she was only one year old and adopted by the men of the strange vessel.