An old gentleman was observed earnestly looking on the sands, evidently for some object he had lost.

An inquisitive onlooker asked, "Have you lost something?" "Yes," was the reply.

Not quite satisfied, the inquisitive one said, "Is it anything important?" "Yes," again came the answer, "I have lost my toffee." "But, surely, the toffee would be useless if you found it, as it would be full of sand." "But my teeth are in it," was the prompt reply.