The penis, for example, has two roots known as crura which play an essential role in its functioning. During sexual excitation these crura become engorged with blood and contribute to erection of the penis. The clitoris, too, has two broad roots, of approximately the same size as in the male. The clitoral crura, too, become engorged with blood early in the woman’s sexual excitation. (Shere Hite)
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