Most of us shake hands when we meet someone but in India people place the tips of their own fingers together and touch them to their own foreheads as a sign of greeting. Some of us kiss people we know well, on the cheek or lips, but the eskimoes and Polynesians rub noses instead of kissing. The Polynesians sit down rather than stand up when an important visitor arrives and in Burma people take off their shoes rather than their hat when they go into a church or someone's house. People are brought up according to their culture and custom. It would take too long to try and begin to explain its origins, but if you ever get a chance to ask people about their specific customs, it can be quite enlightening.