Reading this article about making sperm cells from human bone marrow reminded me of a quote by James Thurber:
"Nature, prefiguring the final disappearance of the male, has aided science in solving the problem of the continuation of the human being with her usual foresight, by establishing the ingenious, if admittedly stuffy, technique of artificial insemination. It is only a question of time before the male factor in the perpetuation of the species becomes a matter of biological deep freeze, an everlasting laboratory culture, labeled, controlled, and supervised by women technicians. The male, continuously preoccupied with his own devices and his own mythical destiny, polysyllabically boasting of his power and purposes, seems blithely unconscious of the conspiracy of Nature and women to do him in."
And of course :
"And the Lord God caused a deep sleep to fall on Adam, and he slept; and He took one of his ribs, and closed up the flesh in its place. Then the rib which the Lord God had taken from man He made into a woman, and He brought her to the man."