The origins of the word play upon the fact that the Mormon religion practices abstinence and, thus the Reverse Mormon.
A sexual act so abhorrent that it is banned in Michigan, Wisconsin, Idaho, Maryland and the Principality of Sealand. Senator Larry Craig(R-Idaho) personally led the campaign to ban it from men's bathrooms across the nation. Many details are shrouded in mystery as most participants die from internal injuries after the Reverse Mormon is performed. Hospitals have began to regonize the extreme orifice tears that it produces and have assigned special teams to care for those patients.
Guy 2-How'd it go?
Guy 1-The doctor I can never sit on my ass again.