A man fell asleep on the beach under the noonday sun and suffered a severe sunburn and heatstroke. He was taken to the hospital where his skin was a bright red, painful and started to blister. Anything that touched him caused agony.
The doctor prescribed continued intravenious feedings of water and electolytes, a mild sedative, and Viagra.
"What good will Viagra do him in that condition?" the nurse inquired.
The doctor replied, "It will keep the sheet off of him."