Never mind that country music is considered bedrock conservative, the unofficial red-state soundtrack. This year, some of country's most famous names are singing in movies with gay and transsexual themes. Dolly Parton received an Oscar nomination for "Travelin' Thru," a song she wrote and sang for "Transamerica," while Willie Nelson and Emmylou Harris are heard on the Oscar frontrunner "Brokeback Mountain." Nelson, always an iconoclast in his music and politics, even released a gay cowboy song on Valentine's Day, "Cowboys Are Frequently, Secretly (Fond of Each Other)." But don't expect a wave of gay love songs to sweep across the...