Actually dreams sometimes form as a residue from the day. In other words, if u were pissed off, angry or even physically not well...probability is that u would have a bad dream and that's just because u have an internal imbalance whether mental or physical.

Sometimes dreams allow us to satisfy our desires without doing it in real life. For example, a person who's hated his father would dream of killing his father, this kind of dream helps him relieve some of the tension without actually harming his father.

Dreams serve so many purposes, whether to let loose bottled up emotions, sexual desires, or tell us that something's going to happen. I can't imagine how life would be without dreams.

I'm not always right, but I'm never wrong :P - Garfield