Why are dreams so confusing and weird?

One of the reasons that dreams can seem a bit strange is because most of our dreams come from the thoughts that we never really thought about that day. For example if i were to see someone that i knew but had never really talked walk down the street and was then to forget them the rest of the day there is a chance that they might turn up in my dream. Also if you have an obbsession there is a chance that you will constantly dream about it. For example if you were to have a crush on someone and were to think about them all day you are most likely going to have them in the dream.

There are many dreams though that we cant know why we dreamt about certain things or someones. For all we know some of the dreams might be visions like Joseph from The Bible but that is highly unlikely.
your mind gives you your dreams. Whatever you think about you dream about.