I have noticed that with some types I can actually extract their cognitive functions naturally by looking in their eyes. I began to see correlations as a child, between different people and how they behave and their voice and eyes and hobbies. What is most interesting is the eyes. Sometimes when I meet another INTj or ENTp, both of us realize what types we are after the initial eye contact. I think that this may have somethign to do with the spaced out look and that we both catch each other psychoanalyzing each other and then try not to do it and smile. The smile seems to be a result of shyness from being caught, and from shyness in showing emotion to the intimacy of being similar (finding out who they are, even if its based on yourself). With my relation of benefit (where I am the benefactor) however their eyes appear as if they have no meaning to them, like two white objects with holes in them, thats all. There must be a way to define these differences, but I need to figure out if the pattern is temporal, or conditional based on information i send with my reactions to their reaction, or if it is just geometry, or all the above. Has anyone given any thought to this?