When, preferably before taking a shower, you are sitting on the toilet and have to take a crap. When said crap is completed, one will totally skip the art of wiping such anus where said crap came out of and, instead, will simply turn the shower on, walk inside of it and bend over.
Once bent over the person will spread there cheeks and have the water hit directly on it, washing away said crap quickly and cleanly (sort of).
Person 1 "Hey man, yesterday I took a crap that had one of those infinite f*cking shit stains going on""
Person 2 "Damn, I hate those. How did you get it off?"
Person 1 "Just yelled 'I'm tired of this sh*t!' and stood up, marched to the shower turned it on and water-wiped that piece of crap."
Person 2 "... Dude, that's disgusting."