 What is the central theme of the story?
Above it her comely face was sullen beneath its sleek cocoon of auburn hair. 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. 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.
 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.