Outdoors. (poop)

"... Anywhere outside of any buildings.

You will wake up to find yourself in a reality where toilets don't exist, instead, the normal thing to do is to go outside and relieve oneself- even in full public view.

You will also be expected to poop outdoors, although, much like with dogs, you are expected to clean up after yourself.

Of course, going outside is not always practical, say, in the middle of the night, or on the top floor of a skyscraper. In which case, you may either be expected to use a chamber pot, or go on a balcony.