Why do we dream.......

We dream because dream is a visual way of communication opted by the sub-conscious mind with us,wat we do,think all tht is done by conscious mind,but,subconscious mind is like the Know-it-all thing.It knows everything around you,ur past,future,it at times warns you(Eg:shows snakes in dreams:it means cunning ppl around u),advices you,makes you realize your mistakes(Eg: u c the door of ur house open in ur dream and wen u check the door is really open),some intuitions in general.But,If all is well u may have a dreamless night.Or e1 a dream where u r celebrating or speeding up in a car which shows tht u r succeeding in life,etc.U dont remember your dreams coz wen u r sleeping actually ur conscious mind takes rest,if u c sumthing big,imp in dreram u remember it but usually the dream doesnt consume much of you thus it does not disturb the conscious mind and ur buffer memory sees the dream which is cleared once the conscious mind takes over.Hence,you forget it,but,if you got too tensed up or too excited the dream are put in main memory and u remember those.....:)