If A is talking to B how many people are participating? On the face of it two. Possibly there are really six. How come? Well 1st there is A as A wants B to perceive A. There is A with the notion of the kind of person B really is, so A is constantly adapting to that, and ther is A as A really is. The same applies to B.
Perhaps this is most evident is long cocktail parties.
May I take this oopportunity of saying Hello to you all - my first visit to this friendly site