In some oriental countries it is deemed very rude to pat children on the head, This is because the head is considered to be the soul of the person and touching it casually is disrespectful. Whereas in the West patting a child's head is a sign of affaction or approval.
When you attend a Moslem household and eat with your fingers from a common dish (as eating couscous in Morocco) it is considered very rude to use the left hand. This is often the hand which people in that country use to clean themselves in the toilet so one does nto touch food with it. Westerners are usually given a spoon!
Our Welfare State. Is it broken?