The result is a bar diagram that mathematicians arbitrarily term the h-profile. Each bar corresponds to one of the various dream elements. The general types of characters, interactions and elements in dreams are much the same worldwide. One common thread in our dreams is, for example, that aggression prevails over friendliness and misfortune over good fortune. Also, men show more aggression in their dreams than women do.
Dreams also differ in several ways between children and adults.
So do outdoor activities. Besides, children are more often the victims of aggressive behavior rather than the source. After adolescence, however, dreams don't change significantly with age. When Domhoff compared dreams within three individual dream series that extended over 20 to 50 years, he found surprisingly little change in an individual's dream history. Compelling examples are dream series with a high overall incidence of murders or highly sexual dreams.