Dreams are the subconcious mind's method of sorting out the information and stimulus it has received during waking hours. Often the information can be jumbled, so quite bizzarre events occur in dreams. Research shows that dreaming is vital to keep the mind healthy. There are people who believe that certain dream subjects have meaning - flying is popularly supposed to indicate that the dreamer is happy and free of worry, and being naked in public indicates anxiety, although these are theories only, and not proven scientifically.