In Denmark flag posted in the window that says that in this house someone celebrating a birthday.
In Thailand on holiday Song Crane decided to pour water passersby, it is considered good luck. Also in Thailand, where the majority of the population professes Buddhism, the head is considered sacred repository of human soul and touching it is considered a serious offense.
Men from some Eskimo tribes lined up to welcome the stranger. Then the first of them comes forward and a good spanking stranger on top of the head, and expects a similar response from a stranger. Slaps and blows continue as long as any of the parties does not fall to the ground. The natives of South America greeted spitting at each other. And some of the African peoples is a sign of welcome protruding tongue.
In Korea, to show that the meal turned out good, and that everything is very tasty, you slurp as loud as possible