I figured out what dreams really are.
When you go to sleep your mind allows you to cross parallel universes and time.
So you, in fact, are living a different life of yourself. Only some where else in time and space!
Once you wake up the connection is broken so you quickly forget what you thought was a dream.
Now. While your sleeping. Does another 'you' visit your mind?
Should be included in an up coming Aliens episode.