When did it become acceptable to be a gold-digger? After all, isn't a woman who sleeps with a man for money - or at least for extensive use of his credit card - called something else? But then, 'prostitute' doesn't have quite the same glamorous, diamond-encrusted platinum ring to it, does it? A new French film opens in the UK this week called Priceless. It tells the story of a woman who selects her mates entirely on the basis of the size of their wallets. Who needs $exual chemistry when you can have cold hard cash?