“Ask not,” said President Kennedy as he rallied young Americans to volunteer for national service in his inaugural address, “what your country can do for you – ask what you can do for your country.” Kennedy had a stricter rule for the women in his life, as journalist Maureen Callahan reveals in her lacerating exposé: asking nothing in return, they were expected to do what their commander-in-chief required, which meant supplying him with sex whenever and wherever he fancied. As a senator, JFK tried out his priapic power by impregnating a 15-year-old babysitter and positioning an aide beneath his desk...