Why do we dream?

Scientist say that the senses may have a lot to do with dreams.In dreams, you see and hear things. Dreaming is not like thinking about things. You have feelings during dreams. You may feel happy or angry. You feel fear if you have a nightmare.Your memories may have something to do with your dreams. Deams are often like stories that stop before they are finished. Dreams show what people feel deep inside.theirs no meaning of dreams, dreams just come from nerve signals in your brains.