Everybody has a wild side that awakens as the rest of you falls asleep, ties on a cape, leaps out the window and takes off on a magical flight to 'Dreamland.'
Everyone dreams, and no one really knows why. One theory that doctors have is fairly simple: We dream to analyze. During the day, whether at school, home, the mall, anywhere, there are at least a thousand different things going on at once. We don't have a chance to analyze everything as much as our brains would like to. So our brains, being the clever little piles of mush that they are, use sleep to analyze those things you missed.
Not all people dream. When you dream, your body enters a stage called REM sleep. REM stands for Rapid Eye Movements, which is basically what occurs. This is the only time dreaming is possible. Some people, for whatever reason, aren't able, or choose not to, go into REM sleep. Therefore, not everyone dreams.'