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Piss rule
(slrpnk.net)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
Pay toilets, and their inhuman morals, were the subject of at least a few Sea Chantys that date back to the 18th or 19th Century.
In ancient Rome, businesses fought over the right to put up free public toilets.
Then they sold the piss.
And the government taxed the piss.