had a dream about someone that makes them fancy that person?

I mean if you hadn't really thought about someone in that way before and they pop up in a dream and suddenly you wake up and think 'hmm! i quite fancy you now!'

I had this, this morning and I was just wondering about it. Is it your subconscious telling you that you really do fancy them but you just hadn't realised before? Or is it just that you happen to have a pleasant dream that alters your perception of the person?

Thoughts?