Etiquette is a code of behavior that influences expectations for social behavior according to contemporary conventional norms within a society, social class, or group. Rules of etiquette are usually unwritten, but aspects of etiquette have been codified from time to time. Rules of etiquette encompass most aspects of social interaction in any society, though the term itself is not commonly used. A rule of etiquette may reflect an underlying ethical code, or it may reflect a person's fashion or status.

Like "culture", it is a word that has gradually grown plural, especially in a multi-ethnic society with many clashing expectations. Thus, it is now possible to refer to "an etiquette" or "a culture", realizing that these may not be universal. In Britain, though, the word etiquette has its roots in the eighteenth century, becoming a universal force in the nineteenth century to the extent that it has been described as the one word that aptly describes life during the reign of Queen Victoria.

Manners

main: Manners Manners involve a wide range of social interactions within cultural norms as in the "comedy of manners", or a painter's characteristic "manner". Etiquette and manners, like mythology, have buried histories especially when they seem to have little obvious purpose, and their justifications as logical ("respect shown to others" etc.) may be equally revealing to the social historian.

In America, the notion of etiquette, being of French origin and arising from practices at the court of Louis XIV, is occasionally disparaged, especially by those unfamiliar with etiquette's social foundations and functions, as old-fashioned or elite, a Likecode concerned only with apparently remote directives such as "which fork to use". Some such individuals consider etiquette to be an unnecessary restriction of freedom of personal expression; others consider such a philosophy to be espoused only by the unschooled, the unmannerly and the rude. For instance, wearing pajamas to a wedding in a cathedral may indeed be an expression of the guest's freedom, but also may cause the bride and groom to suspect that the guest in pajamas is expressing amusement, disparagement, or disrespect towards them and their wedding. Etiquette may be enforced in pragmatic ways: "No shoes, no shirt, no service" is a notice commonly displayed outside stores and cafés in the warmer parts of North America. Others feel that a single, basic code shared by all makes life simpler and more pleasant by removing many chances for misunderstandings and by creating opportunities for courtesy and mutual respect.

Cultural differences

Etiquette is dependent on culture; what is excellent etiquette in one society may shock another. Etiquette evolves within culture. The Dutch painter Andries Both shows that the hunt for head lice (illustration, right), which had been a civilized grooming occupation in the early Middle Ages, a bonding experience that reinforced the comparative rank of two people, one groomed, one groomer, had become a peasant occupation by 1630. The painter portrays the familiar operation matter-of-factly, without the disdain this subject would have received in a nineteenth-century representation.