A hound dog was lying in the yard. An old man in overalls sat on the porch.
"Excuse me, sir, but does your dog bite?" a tourist asked.
The old man replied, "Nope."
So the tourist stepped out of his car. The dog ran over, snarling and growling, and bit him on the arms and legs. As the dog dragged him away, the tourist flailed in the dust and yelled, "I thought you said your dog didn't bite!"
The old man replied, "Ain't my dog."