I was in the Army, 19, living alone in the barracks while stationed at Ft Irwin.
I was super horny that night and sorta just messing around. I got a trash bag and cut two small slits in the bottom, the stepped into it like undies. The slits opened around my legs but seemed leak proof. I spent a little time wearing my "plastic panties" then gave it a leak test by peeing. The warm urine spreading around my groin made me instantly hard.
The next day I bought a pkg of depends...