No digestive track? Or just REALLY good food?

[The Might]

This makes me however woner if a city like Minas Tirith really was as nice as it sounds. If there was no good canalization system, it could well be that MT was as dirty and filthy as any European Medieval town...
Anyway, back to the subject, I guess there was little point in really developing on this....though it is mentioned that Bilbo had bathrooms:

No going upstairs for the hobbit: bedrooms, bathrooms, cellars, pantries (lots of these), wardrobes (he had whole rooms devoted to clothes), kitchens, dining-rooms, all were on the same floor, and indeed on the same passage. ~ The Hobbit