Relationships of identity

Identical partners have perfect understanding of each other without ability to help partner. Identical personality types, the same eyes looking at the world, similarly comprehend incoming information, make almost the same findings as well face the same problems.
They usually sympathize to each other, and try to support, or justify the partner. Identical communication becomes boring, person does not receive any new information from partner, and begins to realize all futility of such communication. Uninformative partner seems boring, uninteresting. Over time these relationships became neutral or cool.
It is not surprising, because if you come to some conclusions, you know that you partner has the same opinion related to received information.
It can be an exception from this rule in case of different levels of experience or knowledge partners possess. Then it may be a great interest and attraction to each other, as the rapid and effective learning process takes place.
Such relationships are ideal for "the teacher-student" couples. Collaboration is also effective in this case, as the forces work in one direction.
It should be said about the influence of subtypes on these relationships. Communication is much more pleasant and easy in case of matching subtypes. If subtypes are distinct partners look at each other with some mistrust. It seems that this person is too zealous.
Identical relations have a great educational value. They allow to assess objectively own strengths and weaknesses. A look at ourselves - it is not always pleasant. Even your own voice, recorded on tape and then listened, does not seem so much worse than you could imagine. These relationships help to develop adequate (correct) self-esteem.