STICKING OUT TONGUE TO GREET IN TIBET

In Tibet,you only need to Stick out your tongue to greet a Tibetan.
According to their historical records,the indigenous people of Tibet have been greeting one another by sticking out their pink tongue since time immemorial. It is a tradition that is still practiced today in Tibet. Visitors are welcomed to greet them this way as well. But they make sure their tongue is pink before they do so black tongue indicates you have an evil spirit. Tibetans know this and follow it strictly.