All you ever wanted to know about duck dicks...

"Some ducks grow phalluses as long as their entire body. In the fall, the genitalia will disappear, only to reappear next spring."

But, wait, it gets better:

"To test her hypothesis, Dr. Brennan plans to team up with a biomechanics expert to build a transparent model of a female duck. She wants to see exactly what a duck phallus does during mating."

Inflatable love ducks?