Because he couldn't sleep with anyone.
Darth Vader.
Nun
Because Tom had previously drowned in the well and everyone said "Tom is sleeping with the fishes."
Because they always want to be right.
Disoriented.
Because when he turns his girlfriend on he has to turn her off again three times.
Only one nights sleep til Christmas!
They only have to sleep 3 more times until Christmas
She heard about his second coming
A psychiatric tryst.