One of the nurses needed to put something on the notice board in the staff room. To do so, she had to stand on the sofa. She removed her crocs before doing so.
This is not a nice sofa. It is old and dirty. It is black, so dirt never shows. People put their shoes on it. Even I have stood on this sofa with my shoes on.
But this nurse still took her shoes off. She obviously knows that polite people do not put their shoes on sofas. Good for her.