Michael loves moustaches and beards! He goes up to people and points at the area below the nose where moustaches belong (unfortunately he does it to women too!) and says, "Dashing". This is because my brother taught him that his moustache was dashing. So Michael thinks that is another name for moustaches.
When we were visiting Josh, Karen, and Aiden in the hospital, someone gave Josh a fake moustache (though I'm not sure why). Michael found it and put it on: