There are these two country farmers milking their cows.
While the one farmer is milking, a fly zooms into the cows ear. The cow starts jumping around, shaking its head and mooing. He tries to steady the cow and suddenly it settles down. He looks down and sees the fly swimming in the milk pail. He turns to his friend and asks “Golly, how’d that fly get down there so fast?”
His friend replies… “IN ONE EAR AND OUT THE UDDER!”