Rise and Dine

Each night in his lair he arises 
He's a fright, so beware -- he surprises!
Getting up from his "bed"
He will sup as undead
One good bite, bloody-rare, satisfies-es.

Unbeknownst to weak-willed Wilbur (Lou Costello), Count Dracula (Béla Lugosi) is opening his coffin: Abbott and Costello Meet Frankenstein (Charles Barton; 1948).