A homunculus argument accounts for a phenomenon in terms of the very phenomenon that it is supposed to explain (in other words, homuncular arguments are fallacious for the same reason that a recipe for cake that had, as one of it's ingredients, 'cake' wou

Sensory homunculus: "This model shows what a man's body would look like if each part grew in proportion to the area of the cortex of the brain concerned with its sensory perception."

This little man sits in your brain

the little man in your brain and your sperm!