A Sport and a Pastime by James Salter
Salter was the fighter pilot in the Air Force. This was the third novel that was published after the fourteen years later. The hero of the novel, a Yale dropout doesn’t want any kind of possession except a young woman in the central France. He was to perform the gentler act but he does not know where to enter. He had tried to find it but she whispered. His arms were trembling at a time. She was breathing fastly. When he withdraws after the first stroke and she was happy with pleasure.