Jim Parsons has joked he would only play Sheldon Cooper again in “another lifetime”. The 51-year-old actor and ‘The Big Bang Theory’ co-star Mayim Bialik reprised their roles as Sheldon and his wife Amy Farrah Fowler in the finale of prequel series ‘Young Sheldon’, but he has played down the idea of returning for another spin-off. Asked by E! News what it would take to get him to play the character in a sequel, he quipped: “Reincarnation? Another lifetime?” Jim admitted he could never totally rule out playing Sheldon again, but he suggested it’s highly unlikely. He added: “Look, never say neve…