Why did the Goblin apply to be a mailman?

Because he was great at delivering scary letters

Why are ghosts so bad at lying?

Because you can see right through them!

Why did the werewolf get confused at the pet store's grooming section?

He didn't know if he was supposed to ask for a trim or a *howl*-cut!

Why did the skeleton refuse to go trick-or-treating?

Because he had no body to go with!