Manners are like primary colors, there are certain rules and once you have these you merely mix, i.e., adapt, them to meet changing situations.
Emily PostNever take more than your share - whether of the road in driving your car, of chairs on a boat or seats on a train, or food at the table.
Emily PostExcepting a religious ceremonial, there is no occasion where greater dignity of manner is required of ladies and gentlemen both, than in occupying a box at the opera. For a gentleman especially no other etiquette is so exacting.
Emily PostThe only occasion when the traditions of courtesy permit a hostess to help herself before a woman guest is when she has reason to believe the food is poisoned.
Emily Post