Then explain why our foreskins would adapt to small advantages over the long run, whereas our spines are still ill-adapted to bipedal stance.
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Replying to @KanStaandPijpen
Because variation in foreskin length exists enabling them to grow longer or shorter but no human had a spine suited to bepedalism so it had to adapt imperfectly.
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Replying to @HPluckrose @KanStaandPijpen
Have a look at the info I sent. We had foreskins way before we were human and they always served the same function. Changes in them to become longer & more complex are small but driven by something. Our spines did not serve the function they do now. We move completely differently
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Replying to @HPluckrose
I read it. The spine should then have a much greater impetus in changing than a foreskin that was functional as-is, right?
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Replying to @KanStaandPijpen
Impetus? Evolution doesn't work by what it is most needed to do apropos of nothing. Variation needs to exist and certain traits be beneficial before it can make changes within a population.
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Replying to @HPluckrose
Exactly. So what would be the beneficial side of changing the functional primate foreskin into our oversized version?
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Replying to @KanStaandPijpen
We don't know. Several hypotheses exist but we often don't know exactly why parts of us look like they do - whatever advantage they once conferred is either gone or is not apparent. One suggestion is protection from seeds & sharp plants before clothes.
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Replying to @HPluckrose
Wouldn't our primate cousins have at least the same level of necessity for it then?
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Replying to @KanStaandPijpen
It seems not. Might be something to do with being more exposed on standing upright. Just a hypothesis tho. Clearly, they didn't need it coz they didn't develop it.
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Replying to @HPluckrose
What are we arguing again? I have the feeling we're on a side track...
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Oh, I don't know. I must start to wind down for the night, anyway.
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Replying to @HPluckrose
Reading back it seems that I argue that there is some use to circumcision. Which I stand by. That doesn't mean that infant circumcision is then ethically OK, of course.
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