Marmaduke, due to his considerable proportions, is able to sit on a couch the way a person would. His owner-lady tries to spin this to her friend as though Marmaduke is a groundbreaking obedience prodigy with a bold and exciting take on a common pet command, rather than just a huge fucking dog who steals your couch when you have company over.
(speaking of crass consumerism, the MARMADUKE IS AN ASSHOLE T-Shirt Pre-Order Fiesta has two more days to go... If you want to be the first kid on your block to tell your mom just how much of a jerk Marmaduke is via a swear word on a t-shirt, and also receive but not directly pay for an index card with something I drew on it that you suggested to me, you have very few other options)