It has to go somewhere though, right? What do you think happens when you flush the toilet, it just disappears?
If you live in a city, it goes in your downstream neighbours' drinking water. (Out of sight, out of mind)
Where I live in the (vast boreal) forest we all shat in holes in the ground/outhouses, then the local go't. decided this was not civilized, so now we all have septic tanks, which are pumped out every few years. I suspect that this then goes to a waste treatment plant, which empties into the Gatineau river, then the Ottawa river, then the St. Laurence, the Gulf of same, the Atlantic. So millions downstream can sample my "treated" waste. Disgusting, IMHO.
And that's civilized.
One of the many reasons why I think civilization was a piss poor idea.