I was thinking of how to describe it realistically to a childless friend... this is my description.
Like being woken at various times throughout the night and made to put little glass beads on a metal tray in little batches of three, then carrying them gently to a very high shelf and sliding the tray on without moving a single bead- or you have to go back and start again.
Then when you finally do it right and go back to bed someone comes along and smashes the tray to the ground and you have to start over. This might happen 1 hour after you went back to bed- or 5 hrs or 5 mins. Random is the key.
At 5am you get up.
Repeated every night for 3 months.
Whats would yours be?