People are talkative animals. We do a lot of talking-asking,answering,telling without words. We often use a kind of "body language" to show what we think or feel. This body language is the language of gestures. We point a finger,raise and eyebrow,wave an arm --or move another part of the body - - to show that we want to say. In other words,"talk" with these gestures. And we make hundreds of these gestures. And we make hundreds of these gestures in a day.