 What is the central theme of the story?
If it only had a lease that could be broken— Roger Tennant, crossing the lawn, could see two of the three wings of the house, which radiated spoke-like from its heptagonal central portion. That on the right was sundeck solar-house living-machine modern, something like a montage of shoeboxes. Above it her comely face was sullen beneath its sleek cocoon of auburn hair. Their captors had no idea of how a woven design should behave. He could sense the restless stirring of the woman within Dana, just as he could feel the stirring toward her within himself—desire that both of them loathed because it was implanted within them by their captors. Within the dome of the barrier, it looked more like a well-kept if bizarre little country estate. But the lawn was not of grass—it was of a bright green substance that might have been cellophane but wasn't, and it sprouted from a fabric that might have been canvas but was something else. They entered the house, which had no roof, continued to move beneath a sky that glowed with light which did not come from a sun or moon. Eudalia, who had borne twin girls recently, was lying back, newly thin and dark of skin and hair, smoking a scentless cigarette. Eudalia had been a female foreman in a garment-cutting shop before being captured and brought through. It arrived before the meal, materializing against one of the seven walls of the roofless chamber. Tennant watched the girls as a sweet-voiced crooner began to ply an unfamiliar love lyric to a melody whose similarity to a thousand predecessors doomed it to instant success. Dana stood almost in the center of the room, carmine-tipped fingers clasped beneath the swell of her breasts. Somehow it brings things closer...." This was so with all of their foods, with their cigarettes, with everything in their prison—or their cage. We seem to be in a universe of different properties as well as different dimensions. "But I'll settle for the fourth—a fourth dimension in space, if that makes scientific sense, because we don't seem to have moved in time. "They pass through their gateway to Earth at considerable danger and, probably, expense of some kind. "But the things they do—stuffing people, mounting their heads, keeping them on display in their—their whatever they live in. "In the one instance, we're the hunters, the breeders, the trophy collectors.
 Experimenting with living creatures -- regardless if it is for entertainment or research -- is unethical, and humans may one day find themselves as subjects.
 In undesirable circumstances, it is best to remain guarded on the inside, but to display an agreeable, obedient, and non-threatening countenance.  Be careful what you worship -- be it vanity, reputation, or money -- because if you make it the center of your world, you will always feel inadequate.  All relationships are ultimately temporal due to three dimensional time and space -- it is only through the fourth dimension that true love can be achieved.  Experimenting with living creatures -- regardless if it is for entertainment or research -- is unethical, and humans may one day find themselves as subjects.