The Obamas are guests of honor at a costume party in the Martha's Vineyard holiday home of a big Dem backer.
The invite says 'Fancy dress' as opposed to the usual, relaxed 'Come as you are' and the First Couple is keen not to be outdone by any other guests.
So come Saturday night a stark naked President Barack Obama turns up at the Finklesteiners' mansion carrying an equally naked First Lady on his back.
'Uh, Mr President,' the hosts says as the Obamas enter his lavish pad, 'you do know it's a fancy dress party, don't you?'
'Sure,' says Obama, 'I have come as a turtle...Can't you see I've got michelle on my back?'