Personal space, an updated form. of Edward T. Hall's 1966 proxemics, is the region surrounding each person, or that area which a person considers his domain or territory. Often if entered by another being without this being desired, it makes them feel uncomfortable. The amount of space a being (person, plant, animal) needs falls into two categories, individuate individual physical space (determined by imagined boundaries), and the space au individual considers theirs to live in (often called habitat). What distance is appropriate for a particular social situation depends on culture. It is also a matter of personal preference. Personal space is highly variable. Those who live in a densely populated environment tend to have smaller personal space requirements. Thus a resident of India may have a smaller personal space than someone who is home on the Mongolian steppe, both in regard to home and individual. Personal space can be determined on a habitat level by profession, livelihood, and occupation. It can also be heavily affected by a person's position in society, with the more affluent a person being the larger personal space they demand. While it is highly variable and difficult to measure accurately the best estimates for personal physical space place it at about 24.5 inches (60 centimeters) on either side, 27.5 inches (70 centimeters) in front and 15.75 inches (40 centimeters) behind for an average westerner. In certain circumstances people can accept having their personal space violated. For instance in romantic encounters the stress from allowing closer personal space distances can be reinterpreted into emotional fervor. Another method of dealing with violated personal space, according to psychologist Robert Sommer, is dehumanization. He argues that, for instance on the subway, crowded people imagine those infiltrating their personal space as inanimate. Changing perceptions about personal space and the fluctuating boundaries of public and private in European culture since the Roman Empire have been explored in 'A History of Private Life', under the general editorship of Philippe Aries and Georges Duby, published in English by the Belknap Press. Which of the following is NOT true?