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    why is the head of a penis shaped like a mushroom


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    Why is your penis shaped like a mushroom?

    Have you ever looked at a penis (either your own, or someone else's) and wondered: why is it shaped like that?  The tube shape is pretty obvious. It fits inside...

    Why is your penis shaped like a mushroom?

    Comment Rebecca Reid

    Monday 13 Aug 2018 9:53 am


    (Picture: Getty)

    Have you ever looked at a penis (either your own, or someone else’s) and wondered: why is it shaped like that? 

    The tube shape is pretty obvious. It fits inside another person nice and neatly, and it’s a good shape for getting sperm up to the top of a vagina (it’s also a good shape for lots of other things, but we’re talking on a biological basis here rather than sexyfuntimes).

    So, you’ve got a tube shape, and that makes lots of sense. But what about the bit at the top? For anyone who isn’t familiar with penises, the top bit is technically called the glans and more commonly referred to as a ‘bellend’ and it’s sort of fluted. A bit like a mushroom. Which is a strange bit of design.

    But actually, there’s an evolutionary reason for the shape. According to research from a team of scientists, led by one Professor Gordon Gallup (yes, really) the shape of the penis is there to allow it to scoop out other men’s semen from a woman’s vagina during sex.

    So back in the olden days when women were encouraged to enjoy the occasional orgy for the sake of reproduction, when she had sex with a whole load of men, there would be a surplus of semen inside her. In order for a man to stand the best chance of being the one who fertilised her with his sperm, his penis evolved to drag other semen out as he withdrew, in theory making it more likely that he would be the baby daddy.


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    In order to explore this theory, the New Scientist did an experiment. They put a mock-up penis with a sizable coronal ridge (aka big bell end) into a fake vagina, and measured how much of a cornstarch mixture it could pull out, compared to a fake penis with no bell end or a smaller bell end. They found that the penis with the massive ridge was able to remove 90% of the cornstarch mixture with just one thrust.

    These days we’re a bit less into the whole free love, not sure who the father is thing (though that is sort of the plot of Mamma Mia Here We Go Again) so that function possibly gets less airtime. But it’s nice to know exactly what your body is capable of.

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    Source : metro.co.uk

    The odd reason your penis is shaped like a mushroom

    THE penis comes in all shapes and sizes - but there is a surprising reason why the end is mushroom-shaped.Scientists claim it is an evolutionary desig

    @[email protected]#=img=# Health Men’s Health NO MORELS

    The odd reason your penis is shaped like a mushroom – and it’s to do with CHEATING

    Vanessa Chalmers, Digital Health Reporter

    11:55, 21 Apr 2022Updated: 12:02, 21 Apr 2022

    THE penis comes in all shapes and sizes - but there is a surprising reason why the end is mushroom-shaped.

    Scientists claim it is an evolutionary design that comes back to infidelity.


    The end of the penis is mushroom shaped, with a ridge separating it from the shaftCredit: Stewart Williams - The Sun

    When considering why the human penis looks the way it does, a team of scientists in New York ran a series of experiments.

    They first theorised that the head of the penis - which is rather mushroom shaped - is in fact a "tool" to remove the semen of love rivals.

    It’s enough to make you squirm, but makes evolutionary sense.

    Men wanted to ensure they are the one who carries on their lineage - survival of the fittest, and all.


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    To ensure theirs is the only semen inside a woman, the ridge that separates the head from the shaft, called the coronal ridge, may help.

    During penetration, it can assist with removing semen from inside the vagina.

    The researchers, led by Professor Gordon Gallup from the State University of New York, put it bluntly.

    Their paper said: “If a female copulated with more than one male within a short period of time, this would allow subsequent males to ‘scoop out' semen left by others before ejaculating.”



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    The team put their theory to the test in 2003, using artificial genitals and fake semen made of mixed starch and water.

    Indeed, the latex penis and its ridge was able to scoop out more than 90 per cent of the "semen" substitute, in just one thrust.

    A member with no coronal ridge only managed to remove 35 per cent of the semen.

    Depth of thrusting was also important for clearing the vagina.

    Prof Gallup told the BBC: "We theorise that as a consequence of competition for paternity, human males evolved uniquely configured penises that function to displace semen from the vagina left by other males.

    "Thus, the human penis may enable males to substitute their semen for the semen of their competitors."

    Cavemen versus the modern man

    While men’s penises haven’t changed since the beginning of time, sex and relationships certainly have.

    The scooping out mechanism would have been much more useful hundreds of thousands of years ago when humans were considerably more occupied with procreating.

    However, our instinctive sexual desires and behaviours in many ways, have stayed the same.

    The researchers said that in their research, they found evidence men still unconsciously use their penis as a “semen displacement device”.

    Two surveys of around 500 college students - both men and women - were conducted.

    Participants recalled that sex with partners involved “deeper and more vigorous penile thrusting” if they had been separarted, or if the female was suspected of cheating.

    It puts seedy doubts over the phrase “absence makes the heart grow fonder”, but backs the researchers’ theory.

    Prof Gallup said: "Under conditions that raise the threat of female infidelity, college students reported changes in sexual behavior that would serve to purge the vagina of foreign semen prior to ejaculation."

    Some experts said they thought the idea was flawed and did not serve as a strong enough explaination on why the penis is shaped the way it is.

    There is no standard shape of penis and while most tips will mushroom-like, they can have a variety of differences.

    Source : www.thesun.co.uk

    Odd reason penises are shaped 'like mushrooms'

    Scientists say that penises have a 'ridge' at the end for a very specific reason

    Odd reason penises are shaped 'like mushrooms' - and it's all to do with love rivals

    Scientists say that penises have a 'ridge' at the end for a very specific reason

    Why do penises look the way they do? (Image: EyeEm)

    ByRobyn DarbyshireAudience Writer

    18:16, 13 Aug 2018UPDATED18:25, 13 Aug 2018


    It's not something people tend to ask themselves in their daily lives but, if you've ever questioned why penises are shaped the way they are, you're in for a surprise.

    Scientists have come up with a fascinating theory behind penis shape.

    We don't mean the length, or the girth, but the bit at the end that can look a bit like a mushroom.

    It turns out there's a very specific reason why it's shaped like that - and it's all to do with biology and love rivals. Interesting.

    Penises are designed that way for a reason ( Image: Science Photo Library RF)

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    The theory is, it's about the survival of the fittest.

    Experts believe the penis evolved to have a "ridge" to scoop out the semen of love rivals, giving them an advantage when it comes to getting a woman pregnant.

    A team of US scientists at the State University of New York conducted an experiment to test this theory in 2003. They used latex phalluses, an artificial vagina and a mixture of starch and water designed to be a similar consistency to semen.

    The results?

    Starch and water made a semen-like mixture for the experiment ( Image: Science Photo Library RF)

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    They found that the penis ridge (the mushroom part where the glans, or head, meets the shaft) could scoop out more than 90 per cent of the mixture with just one thrust.

    Professor Gordon Gallup, who led the team, told the BBC at the time: "The human penis may enable males to substitute their semen for the semen of their competitors".

    The found that a penis that isn't mushroom shaped could only manage to remove 30 per cent of the mixture.

    The scientists also discovered that the depth of thrusting was important - a three quarter thrust could only remove 40 per cent of the semen mixture they created.

    Why is the penis shaped like a mushroom? Because he's a fun guy... ( Image: EyeEm)

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    Bear in mind, this theory is based in the days when women would have sex with multiple men to increase chances of getting pregnant - centuries ago.

    It's not necessarily a particularly useful design these days, as lots of people have children in monogamous relationships, but there we are.


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    Source : www.mirror.co.uk

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