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A Question About Balls

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I think this is an interesting question, I mean you don't see females running around with their ovaries hanging out.

Exactly, which brings up the probably very important concept that you do not need nearly as many fertile men as women to sustain a population. I think you're on to something here. Men are much more expendable, fertility-wise.

I suspect that will be a big part of the answer when I get around to looking it up.
 
MrX
Exactly, which brings up the probably very important concept that you do not need nearly as many fertile men as women to sustain a population. I think you're on to something here. Men are much more expendable, fertility-wise.

I suspect that will be a big part of the answer when I get around to looking it up.

Yeah I'm kind of curious now too...
 
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Forgot to post the answer, or lack of an answer, as the case may be. It's a bit of a mystery.

Here are some things I learned:

The idea that cooling is the reason that we have external testicles has fallen out of favor. It's more likely that we evolved external testicles, and then they evolved to work best at the lower temperatures.

External testicles are important enough that they evolved twice. Once in placental mammals (us) and independently in marsupials.

Marsupials have their scrotum IN FRONT of their penises!
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Right whales have testicles that way in at over 1000 lbs a piece.

One of the most promising theories of scrotal development is that the testicles had to migrate outside the abdominal cavity in animals whose movements created high pressures in the abdomen which created problems with sperm development.

That's all I got. Not a very satisfying answer. Read more here: http://www.slate.com/articles/healt...ling_galloping_display_or_something_else.html