 We can just do this experiment right now, just close your eyes, just for twenty seconds, briskly rub your hands like this. Hold them about three to four inches away from each other. Something happening between them, isn't it? So what is happening is just that because of exuberant movement, now your sensory body expands. So you know why people are rubbing each other all the time because somebody who is not you, you begin to experience them as a part of yourself, maybe momentarily, but it happens.