Marine vs. Sailor
A Marine and a Sailor are in the mens room at a local bar, both doing their business at the urinal. The Marine finishes first, and starts to walk out the door when the Sailor says with disgust, "You know, in the Navy, they teach us to wash our hands after we take a piss." The Marine looks back at him and says "Oh yeah? Well in the Marine Corps, they teach us not to piss on our hands."