yeah. in cities with terrible housing policies (and a large contingent of unhoused people as a result), the "nice" parts of the urban core will not have any public bathrooms. if you walk into a little eatery or cafe, they will exclude you from using their bathroom as you are not a customer. obviously, if you look like an earner (suit+tie, business professional, cop) you can of course use the bathroom.

but the unhoused are not going to buy a $7 latte to use the can, so in their desperation or understandable spite, humans will shit in the street or on the sidewalk. to me, human shit on the streets and sidewalks of a city is an indictment of the city, but it's generally used as more of a "homeless people are so gross" trope / joke in my experience.

edit: i grew up in a city that was like this and moved far away. sometimes i visit friends in "cool" cities and the culture shock of exclusive bathrooms always fucks me up. i'm a big pisser and shitter and if you don't want me to shit and piss up your town, make sure there's free bathrooms.

Yup. San Francisco has a poop map you can browse. It shows exactly where it all is. Shocking, eh?