I was in the Navy in the early to mid 70's. *I was stationed on an aircraft carrier and we had a Marine detachment onboard. *One of the Marines got caught jacking in the shower and got a court martial for abusing government property. *All of us in the berthing compartment I was in jacked in the rack(bed). *We had curtains that we could pull for privacy. *Had to keep the sound effects to a minium but otherwise we all knew that the others were doing it but just kept it quiet. *I know in our showers if you came out and your cock was the least bit inflated or red looking you got teased about jacking. *The boots(new guys) soon learned to jack in their rack.