Two Royal Marines boarded a shuttle flight out of Bristol, headed for London. One sat in the window seat, the other sat in the middle seat. Just before take-off, a Para got on and took the aisle seat next to the two Marines. The Para kicked off his boots, wiggled his toes and was settling in when the Royal Marine in the window seat said, "I think I'll get up and get a coke." "No problem," said the Para, "I'll get it for you." While he was gone, the Marine picked up the Para's boot and spat in it. When the Para returned with the coke, the Marine in the middle seat said, "That looks good, I think I'll have one too." Again, the Para obligingly went to fetch it and while he was gone, the Marine picked up the other boot and spat in it. The Para returned and they all sat back and enjoyed the rest of the short flight to London. As the plane was landing, the Para slipped his feet into his boots and knew immediately what had happened. "How long must this go on?" he asked. "This fighting between our services? This hatred? This animosity? This spitting in boots and peeing in cokes?"