Why can't testicles be inside the male body???

  • twonutbuster

    Posts: 96

    Dec 14, 2008 5:46 PM GMT
    I mean fish and other animals can cool/warm there private parts inside their own bodies, but human males have to hang them outside. I bring up this topic because my 11 year old cousin, punched me in the balls hard, she did it for fun. I fell down and whimpered, it hurt really bad. Why can't balls be better protected, shouldn't evolution resolved this by now????

    Thanks.
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    Dec 14, 2008 6:21 PM GMT
    Fish are cold-blooded, so are reptiles and amphibians. They usually remain cool enough for their sperm to be fertile.

    Birds (and probably Dinosaurs too, the Ornithischia particularly) have developed sperm which can survive at higher temperatures, thus they can still be fertile even though they are warm-blooded.

    It's still unclear why some mammals have descended testes and why some don't. Also why some have scrota and why some don't. In some of the mammals that don't have descended testes though, they usually only mate during the mating season. That is, their testes only descends during the mating season so as to be cooler and start producing fertile sperm. They are only fertile once their testes has descended, at other times, they probably don't even have a sex drive.

    I'd rather have a sex drive all throughout the year, personally. Heh

    Evolution is complex and what's true for one may not be true for another. Some animals may have found a solution through their own branches and some don't. We can't simply borrow a trait from a separate branch of evolution, heh. But through time, a branch may discover the same solutions as another branch, something called Convergence in Biology (an example is the similarity in the fins and body shape of Sharks and Dolphins, even though they are from different branches of animals). Humans obviously still have to live with a vulnerable scrotum just so they can reproduce. Just another proof that we're far from the perfect image of God from the Creation story. Probably part of that can be blamed to the fact that primates use genitals as visual stimuli (an example are baboons with bright blue balls LOL). A male with big balls can impress a female on his apparent fertility. Thus probably reinforcing the development of external scrota in primates.
  • TmanAveen

    Posts: 44

    Dec 14, 2008 6:26 PM GMT
    nice answer Sedativ... very interesting.

    Now, how do we get a 11 yearold to evolve into someone who doesnot hit her uncle in his balls ?!


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    Dec 14, 2008 7:26 PM GMT
    LOL. Don't tell them you have balls that hurt when kicked in the first place? icon_razz.gif

    Oh and I found this chart. It features the Eutherians ('true beasts'), which includes Mammals, Monotremes, and Marsupials. All are warmblooded.

    testicond_phylo_sm.gif
    Results of mapping the three character states onto a phylogeny of the Mammalia. Testicle position unordered: red, testicond; gray, descended and ascrotal; black, descended, scrotal; blue, marsupial; white, equivocal. (Click for a bigger image)

    from here: http://pharyngula.org/index/weblog/comments/descent_of_the_testicle/

    Note how it shows that the primitive/original state is probably to have the testicles descend showing that the descent of testicles really is connected to the development of endothermy. (If you can't understand that chart, think of it as a family tree. Groups on the bottom are granddads and grandmas and whatnot, groups at the top are cousins and relatives to each other)

    Note how again it shows the logical flow of evolution. Red never becomes black or gray again. There are only about 3 branches which show red (testes do not descend, the scrotal sack is not present). Two are primitive branches and one are the sirenids and their allies - Golden Moles, Hyraxes Manatees, Dugongs, and Elephants. They are closely related to each other but VERY different in terms of appearance and habitats. This could actually be explained by the fact that their testes is never cooled. Meaning, the rate of mutation is faster, thus faster evolution. And yes, you heard it right, Elephants don't have balls! icon_razz.gif

    Whales and allies also have a more sophisticated solution. Since their body need to be streamlined, they need to lose the scrotal sack. But they also have to keep sperm cool. Their evolutionary solution is to cool their blood on the skin (they live in mostly cool waters) and then shunt the cooled blood around their internal testes, thereby cooling it. They don't need to have balls then. icon_razz.gif

    Thus we can say that whales have more highly evolved balls than humans. LOL

    Most of the larger mammals (except the aquatic ones) have external balls, which means that it's been pretty effective so far, as far as survival of the fittest goes. Maybe if we can genesplice whales and humans we can produce children with internal balls... but they would only be fertile if they lived in water. icon_razz.gif

    Either ways, if you want to have children, don't heat your balls or wear tight underwear. And don't let 11 year olds kick them. icon_lol.gif
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    Dec 14, 2008 7:40 PM GMT
    But a more fundamental question to strategies for cooling the testicles is why sperm cells need to be cool in the first place. Not all sperm require this, and female eggs survive at internal body temperatures, so it wouldn't seem to be an issue with chromosome damage from heat.

    So why must sperm be cooler? Surely sperm could evolve to tolerate body heat? And eliminate the need for fragile descended testicles to achieve cooling outside the body.
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    Dec 14, 2008 8:09 PM GMT
    It seems like the cetaceans have things worked out pretty well.
    In addition, they have fully retractable penises that are prehensile. They can slip up behind you and tap you on the shoulder with it. Not to mention slipping it in slyly from angles where you wouldn't expect it. Heck, some of them might even be able to hold a beer with it.
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    Dec 14, 2008 9:57 PM GMT
    It's actually a good thing our testicles are outside our bodies... boys/men with undescended testicles have an increased risk of testicular tumors/cancers icon_sad.gif ... that's one of the main reasons the condition is corrected after it is diagnosed.
  • GQjock

    Posts: 11649

    Dec 14, 2008 10:18 PM GMT
    Sperm production works best at a temperature less than 98.6F
    which is one of the reasons the first thing a Doctor tells a couple who are experiencing trouble conceiving to have the man wear boxer shorts
  • Posted by a hidden member.
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    Dec 14, 2008 10:24 PM GMT
    My nephew had inguinal hernia. It's corrected now, but it did make me wince a lot in sympathy while he was still too young to undergo operation. It had to be pretty painful for him. Still, he's 3 now and pretty rambunctious so I don't think it affected him.

    I think the increased risk in cancer has to do with probably disrupted hormone secretions or something. :/

    mindgarden
    It seems like the cetaceans have things worked out pretty well.
    In addition, they have fully retractable penises that are prehensile. They can slip up behind you and tap you on the shoulder with it. Not to mention slipping it in slyly from angles where you wouldn't expect it. Heck, some of them might even be able to hold a beer with it.


    Monkeypenis. icon_biggrin.gif

    Ok two votes for a dolphin-man. No balls and the added bonus of sexual prowess. LOL

    Red_VespaSo why must sperm be cooler? Surely sperm could evolve to tolerate body heat? And eliminate the need for fragile descended testicles to achieve cooling outside the body.


    Good question. Probably because we are after all evolved from cold-blooded animals - fish, amphibians, then reptiles. Endothermy is a pretty recent evolutionary phenomenon which probably developed in a common ancestor of the dinosaurs/birds/mammals and passed it on. Though it could also be possible that endothermy evolved separately in both birds and mammals. I dunno. icon_razz.gif

    Endothermy is an evolutionary advantage. It allows us to move in more varied environments, be faster and stronger because of higher metabolism. In any case, it was an evolutionary breakthrough.

    The price for that apparently is that sperm will now be subjected to temperatures that will damage them hence why mammals evolved externally placed testes and birds evolved heat-resistant sperm. Why mammals didn't evolve heat resistant sperm... *shrugs* your guess is as good as mine.

    Probably if we give the sirenids/proboscids branch a few more millenia they will eventually evolve heat resistant sperm since they apparently subject their testes to normal body temperature already.

    As for a more immediate reason, I found this:

    The specific constraint in the process of sperm development that imposes this limitation hasn't been identified, however; one contributing factor (but definitely not the sole factor) may be that mutation rates increase with temperature, and the male germ line, which undergoes many more cell division than the female line, is much more sensitive to small changes in the mutation rate.
  • Timbales

    Posts: 13993

    Dec 14, 2008 10:33 PM GMT
    if I am bottoming and on my back, a really good orgasm will draw them in. icon_biggrin.gif
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    Dec 14, 2008 10:39 PM GMT
    wheres the fun on them being inside?
  • Posted by a hidden member.
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    Dec 14, 2008 10:52 PM GMT
    It may have nothing to do with the question, but the sex of some vertebrates, such as amphibians and reptiles, is determined by the temperature of the eggs during incubation. Usually, low temperatures produce males and high temperatures produce females. It would be interesting if there were analogous genes involved with spermatogenesis.
    But I'm logged on here because I'm taking a break from working on shit like that, so I'm not looking.
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    Dec 14, 2008 11:03 PM GMT
    Hmm... you mean if cold temperature makes more 'X' spermatozoa than 'Y' spermatozoa? icon_razz.gif Wouldn't matter for females since they only make all 'X' eggs.

    I should be sleeping by now anyway, so I won't look either. LOL
  • Posted by a hidden member.
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    Dec 14, 2008 11:33 PM GMT
    A better question is "why can't 11 year old nieces be kept on leashes?".
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    Dec 15, 2008 1:14 AM GMT

    Your balls are heat sensitive, which is why wearing tight Wranglers everyday drops my sperm count, not that it matters. From an aesthetic standpoint, a nice big set of balls is quite the sight so because of that, I'm glad things are like they are.

  • Posted by a hidden member.
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    Dec 15, 2008 1:18 AM GMT
    nuts are great, tea bagin anyone?
  • Posted by a hidden member.
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    Dec 15, 2008 2:00 AM GMT
    ONSLAUGHT saidnuts are great, tea bagin anyone?


    i'm with you icon_smile.gif
  • Posted by a hidden member.
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    Dec 15, 2008 2:25 AM GMT
    this may win the prize for the dumbest post of 2008. we're not made like Legos, where pieces can be attached, unattached or reattached any way you want. we evolve the way we evolve.
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    Dec 15, 2008 2:35 AM GMT


    My sister tells me a 'nut punch' equals a tit punch, so you really should have a chat with this cousin, being the big cuz and all. We'd be having a talk about hitting 'private' places with a 6 year-old, so 11 should be OK.
  • UTB1

    Posts: 39

    Dec 15, 2008 2:46 AM GMT
    I agree with lilTanker, what's the fun of havin em inside. I think my cock would get lonely with out the boys to knock around.