It’s written quite clearly on the door, but last time I used one I saved a tourist who would have had an unfortunate shower. She grabbed the door when I went out and was going in, I had to warn her and tell her to first let the door close so that the wash cycle would do its job.
In France they have public toilets that basically do number 4. The toilet gets completely cleaned automatically with hot water and detergent after you used it. It works by locking up after you unlocked the door after using it. If you hold the door for someone, they get the cleaning treatment.
It’s a problem because our entire economic system is based on growth and it will be complicated to have economic growth with a decrease in population. Now the fact that our system is based on continuous growth is probably a problem bigger than the decline in population.
Before I had my daughter I was never sick, thought my immune system was strong. Then she started school and I got sick every freaking time she got a little bit sick. Turns out my immune system is crap, I just wasn’t in contact with sicknesses that much.