dreams ~

dreams have always fascinated me.
Ever since I was little, the concept of dreaming was something I thought about.
I've managed to think of many questions that I'd like to understand in all these years, like:
why do you have dreams some nights while others you don't?
why do you see yourself sometimes, while sometimes you see through your eyes?
why do your friends and acquaintances appear in strange roles in your dreams?
why are some dreams completely random, while others seem to have a definite storyline?

It doesn't make sense to me.  
So, I was looking up these questions on Google (because how else do you learn information? haha I'm joking guys) and I didn't really find any answers.

The concept of dreams hasn't seemed to be completely understood by anyone just yet... 
I find this just so strange.

Do you think life today would be completely different without dreams?
Our world would be devoid of many books in which the plotline was inspired by the author's dream.
Maybe some inventions wouldn't exist either.
I'm not sure just how different our world would be.

dreams are such a strange thing to think about, aren't they?