When I was a kid my dad had some honorary grandparents who had only an outhouse. My mom says she potty trained me when they only had an outhouse. Can you imagine?
My grandparents had one we used when we were playing outside. They still use them at the parks here in Iowa. Tho alot of them now have regular toilet seats instead of just the holes.So do and some don't. My grandson Joey refused to use it when he was about 4. It is dark down in the hole and if he couldn't see down there he wasn't sitting on that hole!! LOL
When my kids were little nobody was open on Sundays so when we made the 1 1/2 hour trip to the inlaws we had to know where all the parks were and they only had outhouses then. Of course we never made the trip without having to stop a couple of times both going up and back.