A navy ship had been in an exotic port for a couple of weeks when the captain ordered all the crew together.
‘Gentlemen, I am disturbed to have to say that we have discovered quite a few cases of VD on board the ship,’ he said.
‘That’s good,’ said one of the sailors.
‘What could be good about that?’ asked the captain.
‘Well,’ said the sailor, ‘it’s got to be better than the local beer.’