Where's your sense of humour, blokes? Can't a fat, hairy-chested guy fake being crucified while wearing pink boxers anymore? Well, he can't in the tube. London Underground censors just banned posters for Fat Christ, a play showing this week at Islington's King's Head Theatre. They fear the ads in Angel station, showing the mock crucifixion of the play's writer, Gavin Davis, are "likely to offend ethnic, religious or other major groups." The author, though, apologizes......