I think you all might be happier if you followed the good example I set of just not paying much attention to them at all.
I never think about whether someone is wearing underwear or not unless they are standing stark naked in front of me.
How would you be able to tell otherwise?
OF course - I could not tell you what I was wearing yesterday so what anyone else has on is beyond my observational powers usually.
My person did have one oncologist who wore a lot of odd shoes -my person noticed first, made me look, and then it became a game with us.