How about the following as a speculative response?

Perhaps if neither considers him/herself more expert. Both would have to Thou (as in Buber’s I/Thou) the other. In a relationship in which there is a perceived power differential it is hard (very difficult–>impossible?) for the individual with less perceived power to Thou the individual with more perceived power.

Think of it as a relationship that is conceived in friendship and directed at the better realization of each. If each brings really good listening skills and an ability, further, to accept another in full — each would be enriched and the net knowledge (and sense of completion) might well grow.