Why is this so?

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Perhaps because the testicles are the internal part of male genitalia. I'm assuming natural body heat, like how blood is warm when you donate.

Huh? Internal?

Mine are hangin' down there floppin' around bangin' into everything. Are ya meanin' the garden hose that connects them to the wonder wiggle runs through the insides?

I'm lost.

how 'bout this, theyre internally, external? bein in the Sac and all

But even the bag is external, that's why you have people tyin' irons and weights and sech to 'em.

Ain't that what I said? The garden hose takes from the nut bag to the wonder wiggle.How clear do I have to be.

Funny question.. You expect it to be a shot of ice water?

Along with all the internal/external mumbo jumbo, sperm need to be kept at a certain temperature within the body to survive. That's why when the surrounding enviroment is cold the scrotum will draw in closer to the body and hang more when it's hot out.

That's why I said internal, seeing that the testicles are inside the scrotum. But I guess I got confused along with what I read. Sorry that my confusion is contagious.

I'd imagine that even though sperm are made in the nuts, where its a few degrees cooler, the seminal fluids would be just about body temperature anyway, being from all up in your guts and whatnot.

Thanks for your help, guys!