Because he couldn't sleep with anyone.
TUH KEELLUHHH!!!
A widow
With their heads at the foot of the bed.
Only one nights sleep til Christmas!
A guy who is up all night wondering if there is a dog.
Whatever you like, what's he going to do about it anyway?
He stays awake all night wondering if there's a Dog.
They only have to sleep 3 more times until Christmas
irony irne/ noun a state of affairs or an event that seems deliberately contrary to what one expects and is often amusing as a result.
A psychiatric tryst.