A man once had a terrible accident and ended up losing his ears. He was off work for months but he was keen to get back and so before any prosthetics or anything like that could be arranged he returned to work without ears. He could hear pretty okay thanks to the wonders of modern science but where he should have had ears there was nothing.
He was understandably quite sensitive about this and so the doctor let his boss know. The boss was a good type and the day before the man came back the boss called everyone into his office and explained.
Everyone was glad to see the man back, even though he did look a little strange, it must be said. They also remembered what the boss had said and avoided making any reference to his missing ears.
Everything went extremely well. No-one said anything out of place. Then around 12.30 they all stopped for lunch. The pattern was to bring your own lunch and eat in a particular room together. So they were all sat together in this room with their sandwiches when one of them says to the man "I see you're not wearing glasses anymore!!