In the Tokoyo Inn in Busan, there were some pretty complicated controls beside the toilet seat. I understand the sketch of the “Back” side. I have a couple guesses what the sketch of the “Front” side is showing!?
Anyhow, I tried it out. I thought it was a “shower”, but instead it felt more like a car wash. I was expecting a short burst, and after a few seconds figured out that I had to push a button to stop it.
Whew, uhhhh, thorough!