A guy falls asleep on the beach for several hours and gets a horrible
sunburn. He goes to the hospital, and is promptly admitted after being
diagnosed with second-degree burns. With his skin already starting to
blister, and the severe pain he was in, the doctor prescribes continuous
intravenous feeding with saline, electrolytes, a sedative, and a Viagra
pill every four hours.

The nurse, who is rather astounded, says, "What good will Viagra do for
him, Doctor?

The doctor replied, "It'll keep the sheets off his legs."