This beautiful Lake Duck.
Did you know that this male Argentinian Blue-Bill/Lake Duck has a corkscrew-shaped penis up to 4 inches long? Oh wait, I read that wrong. It is up to 4 inches longer than its body.
Most ducks mate for life. But some duck species tend to have many more males than females. This leads to many rejected men. These males form gangs to violently rape the paws, resulting in the death of some females.
To combat aggressive males, females have evolved a corkscrew-shaped vagina. To combat this, men have evolved a corkscrew-shaped penis.
This is a biological example of a Generative Adversarial Network.
This is a big topic for machine learning/AI right now. And it leads to this:
Some species have up to 10 complete turns from base to tip.
All duck penises rotate counterclockwise. Some duck vaginas have clockwise turns and even ‘blind pouches’ or false cavities that do not lead to the ovaries. Your companion must find the correct path in the maze. But unlike rapists, he has a lot of time to figure it out.
Ducks can be very insidious.
But most of them are harmless and cute.
