Once upon a time, in a certain town there was a coffin maker who opened and was running a store where he sold the coffins he made himself to the customers in the neighborhood. The popuplation in the town increased day-by-day.
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.