A man fell asleep on the beach under the noon day sun and suffered a severe sunburn to his legs. He was taken to the hospital. His skin had turned a bright red. It was very painful and had started to blister. Anything that touched his legs caused agony.
The doctor prescribed continued intravenous feedings of water and electrolytes, a mild sedative and 100mg of Viagra. Rather astounded the nurse inquired, "what good will Viagra do him in that condition?"
The doctor replied, "It will keep the sheet off his legs."