"Because he's a quadruped."
"Why is he like Aunt Lucy?"
"He is so good and faithful."
"Why is he like a bed?"
"His steadiness at his post enables us to enjoy undisturbed sleep."
"How does he resemble a carpet?"
"He generally lies on the floor, but is sometimes brushed off."
"How is he like a lion?"
"He is very fond of meat."
"How does he resemble Cousin Mary?"