It is easier to learn to interpret dreams if you have a reason to use them for something constructive. You apply your dream insights to making constructive changes in your life.
Freud published The Interpretation of Dreams in 1900. It introduced the notion that there existed certain predictable and identifiable processes by which dreams were formed.
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People are learning to feel more comfortable hearing one another's dreams. It used to be that if you told a dream in public someone had to make a joke to relieve the tension introduced by that alternative reality.