Don't Know...

A traveling salesman pulled up outside a lonely farmhouse. He got out and knocked on the door. An elderly woman answered the door and he asked her for directions to Des Moines.

"I'm afraid I don't know," the woman said.

He got back in his car and pulled away. Then he heard shouts behind him and saw the woman and an equally old man in the rear view waving for him to come back. So he made a U-turn and drove up to them.

"This is my husband," the woman said at last. "He doesn't know how to get to Des Moines either!"