Ching Ch'ing, a Chinese Ch'an master, asked a monk:
-What is the sound outside?
The monk answered:
-That is the sound of rain.
The master said:
-Sentient beings are upside down, they lose themselves in pursuit of things.
Donuts,pringles and hamburgers are the proper nutrional intake for the aspiring zen buddhist. Sure you wont be able to poop but who wants to be disturbed by such things when meditating. thats the point though.