Today we often see people shake hands with each other. They do that in different places at different times. People always shake hands when they meet for the first time，but sometimes they shake hands to say goodbye. Sports players often shake hands before games. And when people meet visitors or during special festivals，they shake hands too.
Why do people shake hands? Why don't they shake feet or other parts of the body? Here is a story. A long time ago people used knives or other dangerous things in fighting for their food or land. If some of them decided to stop，they would show there were no knives or other dangerous things in their hands. People shook hands to show there weren't these things in any part of their clothes. Later, shaking hands became a symbol of peace.
Now we shake hands all the time! It is still a way to show we are friendly.
