DEAR MISS MANNERS: I learned that when I am dining and have to excuse myself from the table, I should place my napkin on my chair, so that my fellow diners do not have a used napkin sitting next to their dining plates and food.
However, in all my adult years, I have yet to see even one other person do this, even those with traditionally impeccable manners. Everyone puts his or her napkin on the dining table. Have I been misinformed?
GENTLE READER: Your information is correct. Miss Manners regrets to inform you that your friends, apparently, are not. Even in trivial matters, it is not a good idea to presume that what you see going on around you is the gold standard of behavior.