Corkscrew genitalia for everyone! And penis spines. There are always penis spines.
Male ducks have corkscrew penises.
Male muscovy ducks, for example, have corkscrew-shaped penises that spring out from their body in less than half a second and are 20cm long when erect. Other species' length varies from 1.5 to 40cm.
Some ducks also have barbs on their penises to scrub away competing sperm.
fusaromike
Look away now if you don't want to see a duck penis GIF.
youtube.com / Via gawker.com
Female ducks have corkscrew vaginas.
They twist in the opposite direction to the male duck's penis. But, crucially, they have dead ends they can try to send the males down if they don't want to have their ducklings.
AnetteAndersen
from BuzzFeed - Animals http://ift.tt/1vruYzy
Created by Peter
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