"The ordinary citizen of the Cluster shows a lack of self-consciousness which is typically animal. Without shame he displays his victual, salivates, wads it into his orifice, grinds it with his teeth, massages it with his tongue, impels the pulp along his intestinal tract. With only little more modesty he excretes the digested mess, occasionally making jokes as if he were proud of his alimentary facility. Naturally we obey the same biological compulsions, but we are more considerate of our fellows and perform these acts in privacy."
Marune: Alastor 933, Jack Vance