We hear this one over and over again. I would like to see a videotape of someone actually falling on a bottle so that it was lodged in his rectum. Everybody must have a bigger bathtub than I do. Frequently these people have tubes jammed down their noses, into their stomachs, hooked up to suction to make damn sure that they stay empty. Surprisingly enough, this can get uncomfortable.
People get thirsty.
Critically ill folks in ICU tend to get confused. Okay, so you have a confused, thirsty patient. Hmm, I wonder what he'll drink. Well, it depends on what's in the room. The urine drainage bag at the foot of the bed.