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Double clitorises, spiked penises, and other reptilian reproductive parts

Reptiles have unusual reproductive equipment. For example, female snakes and lizards have two clitorises. Meanwhile, the male tuatara has no penis. "The male simply mounts the female and places the opening of his cloaca—-the cavity where the intestinal, genital, and urinary tracts meet in reptiles—-over hers," writes Tina Deines in a National Geographic article. From Nat Geo: The hemipenes(double penis) of lizards and snakes sport tiny spikes and hooks.
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