Brain: Watcha doin?
Me: Trying to sleep. Leave me alone.
Brain: You know the door’s unlocked, right?
Me: (Goes to check, door is already locked, gets back in bed.)
Brain: Is your alarm set?…
Me: No, I don’t work tomorrow. Don’t need alarm.
Brain: Yeah, but maybe it’s going to go off and wake you up.
Me: I don’t care! I’m going to sleep!
Brain: Are you sure you don’t work tomorrow? You better go check the schedule just to be sure.
Me: Dammit, I just want to sleep! Why are you doing this to me?
Brain: BECAUSE SCREW YOU, THAT’S WHY, IT’S YOU & ME ALL NIGHT LONG! HAHAHAHAHAHAHAHA

(with a h/t to Wil Wheaton, who understands my sleep deprivation)