That's what science _does_, is explain things, like dreaming, that were previously not understood. I don't know about you, but my fantastic dreams of shapeshifting into a dragon and flying away are not lessened by the fact that I know it's just a random electrical storm in my head, picking up on recent memories here and there. If anything, I'd rather know that the hideous nightmares that I sometimes have are physiologically based, than live in a society that thinks that dreams are protents or something. I'd have died from the stress of thinking that the world was going to end (twice), and that I would die (several times, and independant of the world ending) in various nasty ways. My sheer aesthetic pleasure at playing an exquisitely crafted five-octave handmade rosewood marimba is not lessened by me knowing the physics behind the sound production of the instrument.