Speaking strictly from personal experience, one does not urinate when passing a kidney stone. They curl up into the fetal position, crying and moaning, while clutching their sides in agony, and trying to find that impossible position of comfort. Standing and urinating, even sitting and urinating is impossible while passing a stone, even small grain of sand sized stones.
Then you get sudden relief and no pain whatsoever, except some little throbbing sensation in your bladder, then you crawl and sit on the toilet, and urinate bloody urine, and then the stone pops into your ureter tube after your bladder, and you get the feeling that someone is pulling barb wire out of your organ.
Thank you for giving me the chance to completely kill your 'joke'.