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Why are duck penises corkscrew-shaped and how do they mate? | BBC Science Focus Magazine
![Goose Penis by ThaGreatSHeep -- Fur Affinity [dot] net](https://d.furaffinity.net/art/thagreatsheep/1378942300/1378942300.thagreatsheep_2013-09-11_13.52.41.jpg "Goose Penis by ThaGreatSHeep -- Fur Affinity [dot] net")
Goose Penis by ThaGreatSHeep -- Fur Affinity [dot] net
Why are duck penises corkscrew-shaped and how do they mate? | BBC Science Focus Magazine
