Female orgasm adaptation or by product

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She notes too that if the evolution of the clitoris were dependent on the simultaneous development of the penis, you'd expect to see some correspondence between penis size and clitoris size in primates--which you often don't. What really happens is that a female primate tries to mate with a number of males to establish a network that will preclude males from attacking her offspring.

Evolution of the Orgasm

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Female reproductive success, in contrast, is usually limited by the availability of resources to sustain mother and child through pregnancy, labor, and nursing, rather than an availability of mating partners. Chances are her newly sated mate won't be able to gratify her, so she dumps him for a fresh partner. But primate researchers say the animals don"t have much spare time in the wild for mating, let alone for playing with themselves, and it's in the wild that the evolutionary pressures Hrdy talks about are exerted. The monumental problem confronting anyone who wants to explore the antiquity of orgasm is the difficulty of ascertaining, even in existing animals, who has orgasms and who does not. For that matter, does the salmon that spills its seed over a bed of eggs feel a frisson of pleasure?

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