Growing Up: Sex in the Sixties Peter Doggett, The Bodley Head, 400 pages, £25.00 KEN BELL finds a survey of Sixties sex is really about 2020s attitudes In Annus Mirabilis, Philip Larkin reflects famously: ‘Sexual intercourse beganIn nineteen sixty-three(which was rather late for me) -Between the end of the Chatterley banAnd the Beatles' first LP.’…