Ma and Pa's granddaughter Susan was visiting when Pa came home from the hospital. She helped set the table for dinner. Presently everything was on, Pa came in, and everyone sat down.
Ma noticed something was missing.
"Susan," said she, "You didn't put a knife and fork at grandpa's place."
"I thought he wouldn't need them," explained Susan. "This morning you told me he always eats like a horse ..."