My theory- Parallel Universes

i had another wierd dream the other night, but i cant remember anything about it, so im going to tell you my theory instead.
I read it in a book, but I liked it and iv now adopted it as my own.

Anyways, aparantly there are like parallel universes and everything is the same to what it is here on earth, except when we sleep they're awake and vice versa. So.. what im saying is, when you sleep and dream, you're actually seeing what's going on in the paralled universe. Everytime you dream of someone robbing a bank or something, that's whats happening in the parallel universe. There's also the other side, when we're awake, the parallel universe people are dreaming what we're doing! isnt it smart?! I think it is...