Years ago afriend scalded his foot when the handle broke off a tea urn he was moving. A few days later he went to a nurse he knew to have it checked and a new dressing put on. The nurse dressed it with gauze and a bandage. Then she said that it was important that the foot was protected from knocks and produced a large cardboard box stuffed with newspaper which she fixed over his foot with surgical tape. To finish she said it was also important that the dressing be kept dry and proceded to cover the the box with a bin liner and tape it to his leg.
It was only when he shuffled awkwardly out of the surgery, to be met by a friend waiting with camera poised, that he realised he had been had.
Z