To see how long he slept.
By mistake he plugged his electric blanket into the toaster and kept popping out of bed all night!
Rich man has a canopy over the bed, and a poor man has a can o' pee under the bed
He was sleeping with the fishes.
He was told to draw the curtains before going to sleep.
Because he had no knees
Urine trouble.
The ruler!
She was always told a ruler was 12 inches!