The etiquette of intimacy is very different from the etiquette of formality, but manners are not just something to show off to the outside world. If you offend the head waiter, you can always go to another restaurant. If you offend the person you live with, it's very cumbersome to switch to a different family.
Judith MartinTo sacrifice the principles of manners, which require compassion and respect, and bat people over the head with their ignorance of etiquette rules they cannot be expected to know is both bad manners and poor etiquette. That social climbers and twits have misused etiquette throughout history should not be used as an argument for doing away with it.
Judith Martin