Udder Fun

A man and his wife were going to a costume party at a rural mansion. Just in sight of the mansion, the car broke down. They decided to walk.
Since the shortest distance was across a pasture and they were going as a cow, they decided on the short cut. About halfway across the pasture, they ran into a bull who became very "interested." The husband, who was in the back, said, "What shall we do now?"
The wife, who was in front, said, "I'm going to put my head down and make believe I'm eating grass. You had better brace yourself."