Numerous books describe the rules of etiquette. Usually the authors of such books merely codify standards of behavior by classifying various behaviors as polite or rude. However, this suggests that there is a single, objective standard of politeness. Clearly, standards of politeness vary from culture to culture
it is absurd to label any one set of behaviors as correct and others as incorrect.
reaches a conclusion about how people actually behave on the basis of assertions regarding how they ought to behave