Old joke, pertaining to the subject:
A sailor goes to the bathroom, finishes his business and walks over to the sink to wash his hands. As he's washing his hands, a Marine walks in, uses the urinal, and prepares to leave the bathroom.
"You know, in the Navy, they taught me to wash my hands after using the bathroom!", the sailor smugly said.
The Marine stops, looks at the sailor, and says: "Well, in the Marine Corps, they taught me not to piss on my hands!"
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