Have you ever seen a duck's penis?

Long steep penis is looooooooooooooooooooong. Look:

(Somewhat NSFW, it's a video of a duck's penis)

Before a emergence, a drakes penis is customarily utterly dark from view, tucked inside his body similar to an inside-out sock. Drakes unfurl their pensises otherwise than masculine mammals. In mammals, a penis becomes make as red blood flows into a spongy tissue. Ducks siphon lymph liquid instead. And as a liquid enters a penis, it does not simply become engorged. It flips rightside-out.Link | via