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While all human associations are entered into because of some ulterior interests, there is in all of them a residue of pure sociability or association for its own sake. Sociability it the art or play form of association, related to the content and purposes of association in the same way as art is related to reality. While sociable interaction centers upon persons, it can occur only if the more serious purposes of the individual are kept out, so that it is an interaction not of complete but of symbolic and equal personalities. While it is a departure from reality, there is no deceit in it unless one of the persons involved tries to exploit it.
Georg Simmel (Tue,) studied this question.