The sex part was not only because Dagny had feelings with three main heroes in the book, but I think Ayn wrote the sex in the story to show her personal appreciation for sexual freedom. Watch some her old interview videos. I vaguely recall seeing another story mostly about her sexuality and the variety of young men she appreciated. Ayn really practiced what she preached.
As far as the sex, I think they were just paying homage to the author. Being that Dagny, the heroine, had intercourse with the three main heroes of the book. The sex is an amalgamation of a central theme of Atlas Shrugged; celebration. Though hidden under the muck and mire of collectivism, the antithesis of this scourge is to appreciate our champions. And there aren't many strong competitors in the reward category than the giving of one's self intimately.
Quite possibly the worst feature film I have ever seen in a theater. Yet, I did appreciate the visual that brought the Gulch, and the community there of, to life.
Yes, well that was the whole reason John Galt's life was suddenly at risk: because he and Dagny consummated their relationship sooner than good judgment would have dictated. And he knew it going in.
Previous comments... You are currently on page 2.