Our knowledge of dreaming and dreams is so limited because we cannot directly observe them in an experimental setting. Recent advances in our technology have allowed us to kind of take a deeper look into what exact parts of our brains are lighting up when we enter this kind of fantasy slumber. The frontal lobe it controls things like judgment, logic, rational thinking, abstract thought and self-control,. It's kind of what allows us to make sense of things in a rational way. When this part of our brain switches off things get really weird and so do our dreams.