"No problem," said the physician, "I'll get it for you."
While he was gone, one of the attorneys picked up the physician's shoe and spat in it.
When the physician returned with the Coke, the other attorney said, "That looks good, I think I'll have one too."
Again, the physician obligingly went to fetch it and while he was gone, the other attorney picked up the other shoe and spat in it. The The physician returned and they all sat back and enjoyed the flight.
As the plane was landing, the physician slipped his feet into his shoes and knew immediately what had happened.
"How long must this go on?" he asked. "This fighting between our professions? This hatred? This animosity? This spitting in shoes and peeing in Cokes?