There was an elderly couple that went to McDonald's. They ordered one cheeseburger, one large fry, one large drink, and an extra large soda. When the old couple sat down, the man sitting next to them watched the old man cut the burger in half, taking half of the fries and giving his wife half, and pouring the soda in the extra cup he ordered.
The man at the next table was confused, so he went over there and told the couple that if they couldn't afford a meal for each of them, he would be happy to pay for it. The old man shook his head and told him that there was no need because he and his wife had shared everything for the last 40 years.
The man went back to his seat and then he saw the old man eating while the old woman just sat there doing nothing.
He went over to them again and asked the old lady why she wasn't eating.
She said, "Well, it's his turn to use the teeth."