Dreaming

It's said that something you think in daylight will occur in your dream at night.
Recently, almost every night I have a dream. some are clear, some are chaotic, no means to explore, which are composed of several episodes. Sometimes, after waking up, I even want to write them down .
When it comes to a latest dream, Idreamed about someone, but to be honest, I swear,I really never thought of this person before. But!!! why did I dreamed about him ?
What does this imply ?