The letter after Y

I decided to research Sleep. I remember I used to know some cool facts and it was really interesting, so i decided to refresh myself and got some interesting stuff out of it.

So All mammals dream. Birds dream a little bit, but dolphins, dogs, and humans all dream.

During sleep, the Brain archives and sorts memories and data that were acquired while awake.

Some people twitch while they dream, and most breath quickly and their eyes move rapidly.

Dreams come about by completely RANDOM pulses being shot through your brain, and your fore brain interprets it however the hell it wants to. That's why our dreams are so wacky.