1- The unconscious mind appears to sort information by comparing and contrasting. Particularly when we arc aware of conflict within ourselves, we may dream in pairs (e.g. old/young, masculine/ feminine, clever/stupid). It is almost as though there is some kind of internal pendulum, which eventually sorts out the opposites into a unified whole.
2- A dream clarifying the masculine side of ourselves may be followed by a dream clarifying the feminine.
The juggling that goes on in this way can take place over a period of time. Often in dream interpretation looking at the opposite meaning to the obvious can give us greater insight into our mental processes.
3- The use of pairs in dreams is trying lo achieve a Spiritual balance.