My entire nether regions are in such a state that having a shit that isn't complicated and unsatisfying is rare.
Once in a while, i sit down and park a Soviet missile sub in the U-bend, and it may have been weeks since the last one, and it truly is a moment of sheer unbridled joy, I stand up afterwards and actually feel lighter.
I dunno tho, for sheer pleasure it's gotta be the pee you've held on to for so long you may have caused yourself medical harm.
Incidentally, Campbell's Fourth law states that the Intensity of the desire to piss is inversely proporional to the distance from the pissing recepticle. That being, that even tho you last 40 mins in the car, and could have gone 50, now that you're at the door, if that bastard isn;t out in 2 mins you're gonna die. By the time you're at the bog itself, it's more like, if you can;t get your zip down in 9 seconds you'll actually piss yourself.