A man was on holiday in the Caribbean and liking the continual good weather settled down for a day's sunbathing. 

Well, after a whole day his legs were sunburned beyond belief and he could hardly stand the pain. So he goes along to the doctor for treatment. 

The doctor looks at his sunburned legs and said, "Well, you realise that this in only a small village surgery and in reality I've really got nothing at all to help you. 

However, try this." He gives him one tablet of Viagra. 

So the man says, "but I've got acute sunburn what's a Viagra tablet going to do? 

The doctor says, "basically, nothing at all but it will help keep the sheets off your legs tonight