He ordered only one hamburger, only one order of French fries and only one drink. The old man unwrapped the plain hamburger, carefully cut it in half, and placed one half in front of his wife.
He then carefully counted out the French fries, dividing them into two piles and neatly placed one pile in front of his wife. Then he put the drink cup on the table, exactly half-way between him and his wife.
As he began to eat his few bites of hamburger, the people around them kept looking over and whispering. You could tell they were thinking, "That poor old couple -- all they can afford is one meal for the two of them."
As the man began to eat his fries a young man came to the table. He politely offered to buy another meal for the old couple. The old man said they were just fine -- "We are used to sharing everything," he said simply.
The surrounding people noticed the little old lady hadn't eaten a bite. She sat there watching her husband eat.
Again, the young man came over and begged them to let him buy another meal for them. This time it was the old woman who said, "No, thank you, we are used to sharing everything."
As the old man finished and was wiping his face neatly with the napkin, the young man yet again came over to the little old lady who had yet to eat a single bite of food and asked, "OK, but what is it you are waiting for?"
She paused a bit before she answered, as if it were quite obvious, "the teeth!"