Dr. Fish

So I'm at Dr. Fish the other day. Minding my own business. Having some coffee and toast. And I get up to go to the washroom. At Dr. Fish there are two washrooms. There is a large ladies' room with multiple stalls, and a tiny men's room with only one stall toilet. So I go into the men's room. The door to the washroom has a lock on it, the toilet stall has a door and a lock. The Agima sitting on the toilet didn't think to utilize any of these when she decided to use the men's room. But that's not surprising. Apparently, you haven't experienced Korea until you've walked in on an Agima (I hate these pronouncements). What is surprising, is that the Agima was surprised. (??) If you're peeing in the wrong bathroom and not using locks or closing doors, how could you possibly be surprised when someone walks in?