Hilarious. Sorry. Can’t help it. The word potty is funny. Potty means crazy, daft, silly, soft in the head. Potty means Michael Bentine.
In the UK its a porta-loo. Here, a porta-potty. Not much difference. Same purpose, same smell, same reluctance to use.
Here is a clip of Michael Bentine’s Potty Time. I made it through about 20 seconds. The kids think it’s very strange.