"Superman Returns" is being advertised on Logo, the gay and lesbian cable TV channel, so the gay magazine, The Advocate, is asking "How Gay Is Superman?" The Advocate is not trying to claim that Superman is gay. It points out that like many gays and lesbians, Superman has a secret life. Superman has another identity that he doesn't share with anyone, ABC reported Tuesday. The film's director, Bryan Singer, who is gay, insisted that Superman "is probably the most heterosexual character in any movie I've ever made." In the Quentin Tarantino film "Kill Bill: Vol. 2," the character Bill shares...