One thing you don’t do on a United States Navy submarine that’s plunging underneath the polar icecap for days and even weeks at a time?

You don’t take yourself — and your crew — too seriously. Lest you all go insane.

You draw up silly rules.

Take, for instance, the constitution the members of the USS New Mexico came up with — detailed in the following 2014 video report from the Wall Street Journal:

“Friday will be Ke$ha day to prepare the wardroom mentally for the weekend.”

“Any tasking presented while at a meal must be repeated back followed by the phrase #optional.”

“XO has the right to force a member of the wardroom to accept certain foods they have chosen not to eat with the phrase ‘Are you a communist?'”

See the naval operators in action, and on the ice, below: