Andy Farrant's multiple references to Jon Arbuckle drinking dog semen refers to a "Garfield" comic strip from May 30th, 1990 in which Jon takes a drink from a mug, thinking it's coffee. Garfield's veterinarian then tells Arbuckle that he will give birth to a "fine, healthy litter of puppies." Since the contents of the mug were never specified, and based in part on Liz's comment and Jon's reaction, a fan theory spread throughout the internet that the mug contained semen. The theory was later debunked by "Garfield" creator Jim Davis who clarified that Jon drank a "protein-enriched drink formulated for a pregnant dog."