I woke up this morning vaguely or should i say not remembering my dream. Thus , my other half gave me the idea ; why not find out why you cannot remember you dream.

Dreams mainly occur in the rapid-eye movement (REM) stage of sleep—when brain activity is high and resembles that of being awake. REM sleep is revealed by continuous movements of the eyes during sleep. At times, dreams may occur during other stages of sleep. However, these dreams tend to be much less vivid or memorable. Dreams can last for a few seconds, or as long as twenty minutes. A person is more likely to remember the dream if he or she is awakened during the REM phase.
~Adapted from Wikipedia~