‘…[P]ersonal space — how close we stand to our colleagues, our friends, strangers — varies widely between countries. Sociologists have studied the whys and hows, and they’ve come up with some theories about why these social norms exist. Temperature tends to affect how people define personal space. So do gender and age.
But, they think, our personal boundaries have a lot to do with where we grow up. These researchers sort the world into “contact cultures” (South America, the Middle East, Southern Europe) and “non-contact cultures” (Northern Europe, North America, Asia). In non-contact cultures, people stand farther apart and touch less…’ (Washington Post)