The belly button stud. Disgusting. Imagine going down on that, approaching the hot flower, and having to twiddle your tongue around that cheap hard object. Gross. To hell with that.
They know life on Earth is but a blip. You are eternal. Good training. Expand thinking as well as perspective.
Don't stop going back until you are officially fired and forcibly removed. Then you can take legal action at some point. Theoretically at least.
From S. Korea:
How does any of that work in a legal system that is exhaustively demonstrably comped?