![]() The sex act can last for hours, Senter says-commonly, longer than the courtship. The male extends his hemipenes, the two-pronged sex organ stored in his tail, and with each half deposits sperm into the female's cloaca. To mate, snakes need only to align the base of their tails at the cloaca, an opening serving both reproductive and excretory systems. (Also see " Bug Kama Sutra: Flexible Moth Evolved Many Ways to Mate.") However, he noted with clinical delicacy, mounting is not required for "intromission," aka copulation. The snake-atop-snake courtship position called mounting is "nearly universal" in the species studied, Senter wrote in September 2014 in the journal PLOS ONE. In all, he says, it's "quite the set of dance moves." To see how snake courtship evolved, Fayetteville (North Carolina) State University herpetologist and paleontologist Phil Senter studied data on 76 snakes of the Colubroidea and Boidae groups.įrom research that included studies of fossil records dating to the Cretaceous period, he found that some colubroid come-ons are ancient-chin-rubbing, jerking-while the "coital bite" and "tail quiver" began later. In the Kama Sutra of snake sex, these are prime mating moves among colubroids, the world's largest family grouping of snakes with some 2,500 species. Jerking his head seductively, biting her, and vibrating his tail. ![]()
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