Thursday, November 15, 2007

violent sex


The gruesome behavior or the male African bat bug (Afrocimex constrictus) is directed at other bat bugs. Instead of copulating via the female’s sex organs, he will stab her abdomen to release sperm directly into her bloodstream. So the females have evolved paragenitals, a “spongy reservoir of immune cells” as a defense against these tactics. But since male bat bugs are not particular when it comes to mating, some male bat bugs have also developed paragenitals to defend themselves against sexual attack!

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