NEW YORK - Jackie Kennedy Onassis, long regarded as a paragon of chaste virtue in the face of her first husband's relentless womanising, lost her virginity in a Paris elevator, according to a new book. According to All Too Human: The Love Story of Jack and Jackie Kennedy by Vanity Fair writer Ed Klein, the young Jacqueline Bouvier had her first sexual experience with John Marquand Jr, a young writer, during a college year spent in France.