My father served in WWII in the Pacific...he told of a sailor who never took showers, was smelly, and was always getting the unit demerits. That happened a few times and he didn't seem to be getting the message....so one day he was taken into the shower by the rest of the unit and scrubbed -with lots of soap and those wire brushes they used for removing paint off the ship's hull.
He said after the guy got out of the infirmary, he took a shower every day....