On one occasion, the Buddha said to the monks this:
"No other form do I know, O monks, that so persists in obsessing the mind of a man as the form of a woman. The form of a woman persists in obsessing the mind of a man.
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.