* Become dehydrated.
* Go 24 hours without solid food.
* Poop. A lot. For hours.
* Lose sleep.
* Poop some more.
* Go an additional 24 hours with hospital food.
So, I'm just pointing out that when you arrive at the hospital for surgery, and you feel extra-rotten, it's just a trick. They are tricking you.
Don't let them trick you!!