Prejudice in science fiction
Living human beings would not be used for organ banks. by removing a single gene we can cause an embryo to form with no brain or brain stem. They would grow into tissue without consciousness.
Under ideal conditions, a cloned population would not be necessary. It would however be a useful too in the case of a catastrophe or the colonization of another planet, where the the population is too small to maintain a viable gene pool or survivors/colonists are all one sex. The small original group would swell into an ideal population, and with reproduction done entirely by cloning sex would become obsolete.
Suppose there’s a terrible nuclear war, and all of humanity is wiped out with the exception of a single survivor. Now, there’s sophisticated technology just laying around intact after its owners have died, and he uses it to clone himself. The group produced could then clone themselves, and eventually the Earth would be repopulated. The new humanity would all look the same, but would have personalities almost as variable as the old humanity.
This is similar to the scenerio presented in [i]Earth[/i], a science fiction novel I am in the process of writing. It takes place in the distant future, after earth has been nuked back to the stone age and started to build itself back up over the millennia. In it, there are a number of trans-humans (homo sapiens, but not of our subspecies) that were produced by divergent evolution and eugenic breeding by nonhuman slavelords. The only group that did not suffer cultural regression during the nuclear holocaust is the Order of the Yün Siph. They are all cloned from a single man who lived long, long ago and are the epitome of spiritual enlightenment. The main character in the short story that is thus far my only published work of science fiction is a Yün Siph, a clone. The Yün Siph are the protectors of peace and order in a merciless and chaotic world, but suffer from hatred and prejudice because of their way of reproduction and the fact that they belong to the race responsible for the nuclear war.
I think after a few generations on entirely cloned reproduction, sex would be essentially forgotten. I do not believe that sexual appetite is something common to all humans as I have never felt it and I’ve always been taught that having such feelings would be bad.