When a person has been sitting still for some time he will want to move, to rub his hands, his feet, just to feel he is alive. If someone is very fond of the society of his friends and they are not with him, he will want to go out to see them. It is not really because he wants the friends; it is because if his friends are not talking to him, if he has to miss their activity, he does not feel that he is alive.