The idea that you earn some major points as a medical student if you do an exceptional job and remain utterly enthusiastic while performing a seemingly mundane task such as pulling back tissue in surgery for your attending doctor.
Student 1: "I can't believe Johnny got that residency spot. Must've been his positivie attitude and his efforts to do everything he could to help out his attendings in surgery."
Student 2: "Yeah, must've been a case of 'addition by retraction'."
This natural phenomenon has been around since the dwarven days of old. When two men desired anal they would conjoin there anus's and one partner begins by defecating. Once the fecel matter has penetrated the parallel anus the sphincter reacts and takes in the feces and mothers it as if it were its own. Once the anus has acquired its new bounty it relieves its self back from whence it came. Once statrted, the petpetual anal motion can not be stopped or disturbed by any means or this very act would be defying god himself and all life would end.
The Perpetual Anal Motion Postulate Therum Vol.1 Revised Addition Platinum Anal Series Copyright 1901 can perpetuate in my cavity any day.