Marmaduke's owner-lady is trying to impress a veterinarian's office by claiming her dog has both highly discerning medical requirements and the ability to read. Meanwhile, Marmaduke has mistaken a diploma for some food.

Marmaduke eats more dog food than his owner-family can reasonably afford.

Marmaduke's owner lady made him so horny working out to her Jane Fonda tape that it plum tuckered him out. He is still going to fuck the shit out of her, but may need a nap first.

Marmaduke does not pay attention to cyclical shifts in weather patterns accompanying the changing seasons because he is a dog.

Marmaduke's owner-man is Jesus Christ.