"There is much to be said for post-menopausal celibacy. Sex is rough on loners because you have to have somebody else around, but now I don't. No more diets to stay slim and desirable: I've had sex and I've had food, and I'd rather eat."

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It does not, however, seem impossible that by an attention to breed, a certain degree of improvement, similar to that among animals, might take place among men. Whether intellect could be communicated may be a matter of doubt: but size, strength, beauty, complexion, and perhaps even longevity are in a degree transmissible... As the human race could not be improved in this way, without condemning all the bad specimens to celibacy, it is not probable, that an attention to breed should ever become general.

— Thomas Malthus