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Call the duck police!
( , Thu 3 Mar 2011, 15:43, Reply)
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That's how ducks breed.
Quite interesting how ducks have evolved because of mating habits. The female has evolved a corkscrew-shaped vagina to cut down on being raped, and as a result the male ducks have developed corkscrew-shaped penises to try and mate.
Bet Darwin never thought of that one!
EDIT: a bit about breeding here, though no mention of duck willies... en.wikipedia.org/wiki/Mallard#Breeding
( , Thu 3 Mar 2011, 15:55, Reply)
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To an award-winning blog post (!?!) on the subject.
blogs.discovermagazine.com/notrocketscience/2009/12/22/ballistic-penises-and-corkscrew-vaginas-the-sexual-battles-of-ducks/
( , Thu 3 Mar 2011, 17:01, Reply)