Thread: Did you say duck penis?

This is from a real research journal.

Explosive eversion and functional morphology of the duck penis supports sexual conflict in waterfowl genitalia

Abstract
Coevolution of male and female genitalia in waterfowl has been hypothesized to occur through sexual conflict. This hypothesis raises questions about the functional morphology of the waterfowl penis and the mechanics of copulation in waterfowl, which are poorly understood. We used high-speed video of phallus eversion and histology to describe for the first time the functional morphology of the avian penis. Eversion of the 20 cm muscovy duck penis is explosive, taking an average of 0.36 s, and achieving a maximum velocity of 1.6 m s−1. The collagen matrix of the penis is very thin and not arranged in an axial-orthogonal array, resulting in a penis that is flexible when erect. To test the hypothesis that female genital novelties make intromission difficult during forced copulations, we investigated penile eversion into glass tubes that presented different mechanical challenges to eversion. Eversion occurred successfully in a straight tube and a counterclockwise spiral tube that matched the chirality of the waterfowl penis, but eversion was significantly less successful into glass tubes with a clockwise spiral or a 135° bend, which mimicked female vaginal geometry. Our results support the hypothesis that duck vaginal complexity functions to exclude the penis during forced copulations, and coevolved with the waterfowl penis via antagonistic sexual conflict.

Click this link for pictures http://rspb.royalsocietypublishing.o...9/F1.large.jpg

I smell a thought expirement...Horse penis into a horse vagina or duck penis into glass tube?

I shout duck! penis! everytime I unleash my 3 inch beast on an unsuspecting chick.

It is true, however, that 99.8% of American turkeys are artificially inseminated. The reason for this? There have been over a hundred years of selective breeding, use of growth hormones, steroids and mega dosing with antibiotics. The result is an animal that is so deformed that it cannot physically mate.

So, next time you sit down to your turkey dinner, think of the poor bastards who have to hold Gordon and Glenda Gobbler in the right position for a spot of feathered fornication (maybe even giving Gordon one off the wrist if he is being a little slow).

whimpering toothless chav, surely you mean duckling?