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You’re doing it wrong, serotine bats.
Is it really seven times wider and seven times longer? Did a male serotine bat tell you that? And you believed it?
It sounds like someone made a wish to a genie and it was granted in the worst possible way.
Are there any guesses as to why they evolved this way? What advantage does this have over penetrative sex?
So why might the serotine bat have evolved such an enormous sex organ? The authors suggest that females might use their tail membranes to avoid mating, and the males’ long, thick penises could be used to push that membrane aside. “The hollow structure observed in the dorsal side of the erect penis might serve as a suction cup and support the maintenance of the copulatory contact,” the authors wrote. “Therefore, the penis’s size, shape, and prolonged embrace might further support the transport of sperm cells into the vagina and through the long cervix.”
This only partially answers the question of why, though.
