Why do human testicles hang like that?

[dtotire]

Why do human testicles hang like that?
By Jesse Bering

Earlier this year, I wrote a column about evolutionary psychologist Gordon Gallup’s “semen displacement hypothesis,” a convincing hypothesis presenting a very plausible, empirically supported account of the evolution of the peculiarly shaped human penis. In short, Gallup and his colleagues argued that our species’ distinctive phallus, with its bulbous glans and flared coronal ridge, was sculpted by natural selection as a foreign sperm-removal device. As a companion piece to that work on our phallic origins, Gallup, along with Mary Finn and Becky Sammis, have put forth a related hypothesis in this month’s issue of Evolutionary Psychology. This new hypothesis, which the authors call “the activation hypothesis,” sets out to explain the natural origins of the only human body part arguably less attractive than the penis--the testicles.


more:
http://www.scientificamerican.com/blog/post.cfm?id=why-do-human-testicles-hang-like-th-2009-11-19

[Dennis Donovan]

1. How else would one "teabag" if they didn't?

:rofl:

[hobbit709]

2. They hang because of gravity.

[StopTheNeoCons]

3. Temperature regulation, when cold, no hang; when hot, lotsa hang..eom

[Sal Minella]

4. Or as one of my friends said decades ago,

"Side-by-side for comfort, front-and-back for speed."

I still am not sure what that means, so I offer it for consideration here by analytical minds better than my own.

[Demoiselle]

5. Temperature regulation in another way, too...

Suspending the sperm away from the body keeps them cooler. And cool sperm swim faster and do their fertilization work more effectively. I remember reading somewhere that a tribe of (so-called!) primitive people somewhere in the world practice a form of birth control by having their men sit in tubs of very warm water. Slows the little swimmers down.
One more thought. Ladies, if you're trying to get pregnant get your man to trade his tighty whities for boxers. It worked for me.
That is all.