Because he couldn't bark
Someone who stays up wondering if there is a dog.
I like "Hot Dogs".
Mine would have to be Why did sally fall out of the tree? Because she had no arms. Knock knock. Who's there? Not sally.
He was stapled to the first monkey! How'd the Third monkey fall out of the tree. Peer Pressure.
Bark you car on the drive !
A: A dog barking in a mirror.
A refrigerator. Sorry.
He really wasn't feeling up to it.