Movie great James Stewart was forced to prove he wasn't gay by bedding two hookers, according to an explosive new biography. Movie mogul LOUIS B MAYER reportedly instructed the IT'S A WONDERFUL LIFE star to prove to him he wasn't a homosexual before offering him a film deal, sending the actor off to find a couple of prostitutes. The shocking claim is made by Marc Eliot in his new tome JIMMY STEWART - A BIOGRAPHY, which is set to hit bookshelves this autumn (06). Eliot claims Meyer demanded Stewart prove he wasn't gay by visiting a Hollywood brothel and bedding "at least two of those broads". The biographer claims the young Stewart was so charged by the sexual experience, it sparked a string of romances with Tinseltown's leading ladies.