She Doesn’t Love You
January 1, 2009
The male duck is extremely aggressive, and is known to rape female ducks in large numbers. The female duck has since evolved to have several dead-end vaginal passages to divert the male’s penis. The one real vaginal passage has become spiral in shape so that she may clench off the area to unsuitable ducks, and also prevent pregnancy.
In response, male ducks are now reported to have spiral-shaped penises.
