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Female penis, male vagina, and their correlated evolution in a cave insect.

In This Insect, Females Have Penises And Males Have Vaginas

Electronic address: psocid res. Sex-specific elaborations are common in animals and have attracted the attention of many biologists, including Darwin [1]. It is accepted that sexual selection promotes the evolution of sex-specific elaborations. Due to the faster replenishment rate of gametes, males generally have higher potential reproductive and optimal mating rates than females. Therefore, sexual selection acts strongly on males [2], leading to the rapid evolution and diversification of male genitalia [3].

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I am a male of average endowment and not seeking some perverse thrill by asking the following question, its something I always wanted to know. I understand the vagina is 6 inches in depth and is very elastic when it comes to width. But what about these abnormally large penisis over 10 inches, can all women handle these without suffering physical damage?

All rights reserved. This picture of two mating insects comes with an unexpected twist. The one on top is a female, and she has a penis. The one on the bottom is a male, and he has the equivalent of a vagina.

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