Robert F. Kennedy Jr., former presidential candidate, admitted to being a slave to his “wild impulses” and “powerful demons” when it comes to sex in his diaries, according to exclusive new revelations. In one of the volumes viewed by The Post, Kennedy wrote of wrestling with his “lust demons” while keeping a score card of more than two dozen conquests at the back of the book. At that time, Kennedy was married to his second wife, Mary Richardson Kennedy, who took her own life in 2012; today he is married to Hollywood actress Cheryl Hines. It was revealed last week that Kennedy had been engaged in a nine-month alleged sexting relationship with reporter Olivia Nuzzi, New York Magazine’s White House correspondent. The Post first revealed the secret diaries in 2013, one year after Mary’s suicide.