We thought we’d seen everything on “The Amazing Race.” Spouses, friends and lovers (straight and gay), siblings, parents and children. But here’s a new one for “The Amazing Race 12,” which begins Nov. 8 on CBS. Kynt Cothron and Vyxsin Fiala. Relationship: “dating Goths.” Kynt, the 31-year-old male, and Vyxsin, the 29-year-old female, are both waiter-hair salon receptionists from, of all places, Louisville, Ky.