A man walks into a bar with his dog, but the barman tells him, “No dogs allowed.”
“It’s OK, this is no ordinary dog” the man responds. “This is a talking dog. I’ll show you.”
He turns to the dog and asks, “What grows on trees?” and the dog replies, “Bark, bark.”
“What’s on top of a house?” the proud owner asks and the dog says, “Roof, roof.”
“What’s the opposite of smooth?” is the next question and the dog responds, “Rough, rough.”
But the barman is unimpressed and throws them out.
The dog is puzzled and asks his owner, “Which one did I get wrong?”