There's different kinds of shit, everyone's experienced it I guess: the best ones are not the ones you remember as you just sometimes sit down, empty your rectum with ease, wash your ass if you have some kind of education, metrosexual or gay and get up in less than a minute. You'll congratulate yourself for your high-fiber diet and move on with your day.
Then there's the tough shit that will get you turn the place into a bunker filled with more gas then an Auschwitz gas chamber in 1943; 40 minutes later, you've been sweating like a pig, gotten the shakes, your anus feels in such a way that you suddenly have empathy for Goodrum, and you still have the nasty impression that you could shit another 2 pounds on top of the previous ones. Those ones you remember.