Secrets of the Abbey

Original title: Il mistero del convento

Directed by Mario Salieri

In this film it's 1944 and World War II is raging, a group of soldiers meets nuns at a convent and the ladies want to help with the war effort by fucking all of the troops. The morale of the guys will be higher than ever with the ladies giving up their asses and sucking every dick that's wearing a uniform.