Although in the show we've seen outhouses, this "what if" story takes place in an Equestria in which the ponies just sort of go to the bathroom wherever, like in that joke tweet by Lauren Faust.

There's no sex or gore in this story, but it's rated Teen for the occasional curseword and, uh, the fact that it's mostly about shitting.

Special thanks to Fimfiction IRC for the inspiration/blame, especially Zini. This is all Zini's fault, specifically.