"Harry Potter" author J.K. Rowling faced another backlash Saturday after issuing a cheeky tweet on sex and gender that opened up a new chapter in her ongoing feud with LGBT advocates. "If sex isn’t real, there’s no same-sex attraction," Rowling tweeted to her 14.5 million followers. "If sex isn’t real, the lived reality of women globally is erased. I know and love trans people, but erasing the concept of sex removes the ability of many to meaningfully discuss their lives. It isn’t hate to speak the truth." Rowling tweeted those comments around 6 p.m. ET. Within an hour, she was...