I believe that everything you see means something. Most of the stuff is just out of our league and we don't understand it . Subconscious mind shows us our real feelings/needs/thoughts in its own way and you might not even be aware of them. For example my friend told me that she dreamed about smashing her friend's apartment. She remembered she was furious in her dream. Later that day girl realized that although she gets along with friend, she actually hates him little. Might be confusing, but makes perfect sense to me .
Anyway that's just what I believe.