we have two kinds of lanuguages--spoken language and body language. if you observe carefully ,you will notice that some of the body languages share the same meaning in different cultures. for example, nodding head means"yes" while shaking head means "no".but at the same time, different cultures use different ways to show their friendliness, for example, in china,we shake hands the first time we meet a friend, but Japanese bow and most people from western countries hug each other. besides, there are still many body languages, so, knowing about that would be helpful for us to communicate with people from other nations.
