Well if i know what you are trying to say, brains never sleep. But when i dont recall, i just use that sentence thats all. Dreams are your subconscience thoughts/feelings/desires/etc. firing off randomly and your logical-mind trying to make some sense of the madness It is just your mind's way of relaxing and letting off steam. It's probably an exercise of the creative portion of your brain, which more than likely helps your mind channel it for your day to day living. People do say you go mad if you don't dream(sleep deprivation). So perhaps if you don't dream, then your creativity runs away from the control your logical mind has, and you start freaking out.... I just had a dream about dreaming. I was trying to explain to the people in my dream about what I was dreaming about in the dreams dream. Weird. not kidding.. :D What if I'm in a dream right now..? I'd be in a dream where I tell others about a dream, about a dream. LOL