Eliminating bodily waste is no laughing matter when living in an underground complex. This partially explains the large number of toilets found by the players in the
Montporte Dungeon--a total of 22 toilets found so far between 12 rooms on 2 levels. I am not interested in trying to explain the technology or the logistics of all of these little stone thrones...I merely wanted to create a sense that someone had once lived there and those someones were concerned about hygiene. While flushing toilets are a modern invention, toilets are not all that uncommon in ancient ruins.