Etiquette

You ought to regulate your manner of behaviour towards others, not according to your own humour, but agreeably to the pleasure and inclination of those with whom you converse.

— Etiquette

Dear Miss Manners: What about Easter? I suppose you have etiquette rules that apply to Easter Day?Gentle Reader: Certainly, and when the Day of Judgment comes, Miss Manners will have etiquette rules to apply to that, as well.

— Etiquette

Etiquette is a set of rules people use so they can be rude to each other in public.

— Etiquette