When someone asks you if you want something, you will usually shake your head up and down if you mean ‘yes’ or from side to side if you mean ‘no’. In most places, an up and down movement of the head signifies agreement, and side to side movement means disagreement. But did you know that in some places like Bulgaria, parts of Greece, Yugoslavia, Turkey, Iran, and Bengal, people shake their head from side to side to say ‘yes’ or to show agreement