I road the train with a GF while away at summer senior trip in High School. We landed in Chicago, and was supposed to change planes. Instead we told our parents (long before) the trip plans had been changed and we were riding Amtrak back from Chicago.
I rented a sleeper car and slept so well in those single fold down beds that woukd sway as the train rocked back and forth as it moved down the tracks.
Sex was difficult, but once we figured it out the swaying movement added an extra demention to a wonderful high school senior trip.