Tales from the Foxhole (1999)

Two horny young marines discuss personal homosexual experiences in detail, before night falls. As the thunder rolls and lightning flashes, Lyons dreams about his basic training unit. There marines are masturbating in their bunks, when suddenly the drill instructor catches them and makes the offenders fellate him. The others are forced to masturbate in formation. As dawn breaks and the rain stops, the two foxhole buddies discover their mutual horniness.