This is a hoot for anyone who believes lawyers will never understand sex. Something happens to the poor little devils when they start wearing wigs . Cynthia Payne was a brothel-keeper with a heart of gold who lined up her clients in suburban Streatham with tickets to take their turn and Luncheon Vouchers. When the public realised she didn't give a damn, Cynthia became a folk-heroine. Novelist Paul Bailey tells her story.