This one is a little hard to describe. It has little to do with the body of one, and is not so much of a brain process. This plane include everything that doesn't show up on a 3D picture of one, and that doesn't show up on an epistolary exchange (that is purely informal and as such purely brainy). It is the way to move, the way to smile, the facial expressions , the general attitude of someone. It is, I think, the most important plane in a social exchange. It takes a few minutes or one hour of exclusive communication to assess, depending on the complexity of the pattern and on the extrovertedness of the subject.

The first plane is rather anecdotal (except in case of sexual interest), this one will decide if you like someone or not. Then, the 3rd plane will decide if you agree.