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Why Do Men Have Nipples?

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If men can't nurse, then why do they have nipples? The answer has less to do with evolution and more to do with your personal development as a teeny tiny embryo. Short version: We're all girls -- at least at first. Hank explains! Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/artist/52/SciShow Or help support us by subscribing to our page on Subbable: https://subbable.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Thanks Tank Tumblr: http://thankstank.tumblr.com Sources: http://www.scientificamerican.com/article.cfm?id=why-do-men-have-nipples http://science.howstuffworks.com/life/human-biology/why-men-have-nipples.htm http://www.scientificamerican.com/article.cfm?id=strange-but-true-males-can-lactate http://www.livescience.com/32467-why-do-men-have-nipples.html http://www.huffingtonpost.com/2012/09/04/why-do-men-have-nipples_n_1847460.html http://ghr.nlm.nih.gov/gene/SRY http://www.nature.com/news/1999/990805/full/news990805-1.html http://www.salon.com/1999/06/08/nipples/ http://www.emouseatlas.org/emap/home.html
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Text Comments (1971)
Frmr Christian (2 months ago)
Pacifiers for when Mom's away! : )
Nathan Greene (2 months ago)
I envy your intelligence.
Dennis Brown (3 months ago)
they provide sexual stimulation for some
Farhan Khushal Dar (4 months ago)
I have a same problem how i can solve?
rautamiekka (5 months ago)
Also, having nipples allows for breastfeeding if it turns out you're more female than male.
Sara Almagesto (5 months ago)
Back when SciShow still used the terms "male" and "female" for humans, before censoring them becuase they might be "offensive" to people who don't know the difference between human sex and gender.
We Can't Be Friends (5 months ago)
Peck hat
*Men has nipples because god knew how fickle women can be! (>﹏<)*
jewa tokes (7 months ago)
Mhmm but Adam was made first eh 😂
Abisshek Raj (8 months ago)
The Barbie Official (8 months ago)
yay we are all girls
G Wind Star River (10 months ago)
"Peck cap" is awesome 🤣 haha
Rami Awad (10 months ago)
0:56 " Most babies are usually male or female " Umm, what are the other options ? xDD
Mark S (11 months ago)
The fact that we all start life as female, is why almost all transgenders are men who want to be female. Lots of female impersonators. No male impersonators. Cross dressers are almost always men.
Jonathan L (1 year ago)
God put them there because it looks more beautiful
Raphael Rae (1 year ago)
If you have nipples, just enjoy them. They are cute and sexy.
liveonthesun (1 year ago)
Hey. Make a video about y some males start lactating
It helps make up for our missing asymmetric 25th rib
anupreet ghosh (1 year ago)
It helps fr sexual arousal i guess, lots of nerve openings like lips or other sensitive areas
Hiroko Takashiro (1 year ago)
Had me at nipple cap lol.
Anthony A (1 year ago)
So could you change this before we develop nipples lol?
A'lice Sweets (1 year ago)
Because they come out a woman who made him in her reflection wombmagic
Rizvi Am (1 year ago)
Two pairs of nipples? Well that explains Harry Styles.
Justwantahover (1 year ago)
I have a use for my nipples, they are really sensitive and touching them makes me get off.
Deeney (1 year ago)
Don't really care, all I know is that I love them on guys
Roberto Velez (1 year ago)
Thank God we have them, i just love a man's nipples.
Masked One (1 year ago)
"You heard me tough guy" That made me lol🤣
You forgot to censor the thumbnail.
Jc Williams (1 year ago)
Lexi Cox (1 year ago)
I have tried to explain this concept of why guys have nipples to people for so long, but literally nobody believes me.
Rix Pix (1 year ago)
Humans are incredible creations.
Heather Troyer (1 year ago)
Lisa Ciancanelli (1 year ago)
"not a mole."- Hank
Earl Fechter (1 year ago)
He blushed when he commented on his nipples as "peck
Milkookie c: (1 year ago)
We can already look at ourselves without nipples look at those barbie and ken dolls.
Why do men have nipples?  So my girlfriend can play with them.  I get no enjoyment out of her playing with them, but she loves it.
therabbithat (1 year ago)
AH SH** MY LEFT NIPPLE IS.. oh no wait there it is
Andres Leon Rangel (1 year ago)
every time i watch this videos I confirm science doesn't have answers to everything. Not everything has to be superficial and physical thank God...
George P (1 year ago)
I don't get it though. Our sex is determined as fertilisation, so we will always be male
Vinit Chaudhari (1 year ago)
great to know it, I wondered this question when I was young
knight solaire (1 year ago)
*opens video* "nipples!" this gonna be good XD
Denise Flattery (1 year ago)
Why do have birthmarks & how do they form? What causes babies to go blue?
SILVΞR (1 year ago)
I think I haven't finished my embryonic stage yet.
Gail Bull (1 year ago)
"Are you a man or a mouse?" Answer: "I'm a man and I have the nipples to prove it!"
The Official Remi (1 year ago)
anyone else watching without a shirt on?
Stinson Monrovia (1 year ago)
Scotty Zinifire (1 year ago)
lol i aways wondered why that guy had four nipples
Sadie's Beanz (2 years ago)
y'all have nipples cuz males can breast feed. oh wait, no? okay..
Taikamuna (2 years ago)
I have three nipples
Stone Ro (2 years ago)
Peck caps...like little hats
Notumengi (2 years ago)
could we get a protein like that in humans? nipple-less guys.
Illyr (2 years ago)
//awkward smiling "THEY'RE NOT MOLES"
EliosMoonElios (2 years ago)
I study fetal development and discover all humans start with female bodies, rudimentary vagina and uterus, and when testicles start to produce testosterone is when the vagina close to male genitals. Male hormones just cross out -lactation- genes and only left dry nipples, until males take female hormones and lactation start functioning again.
AnselAlly (2 years ago)
Piotr Slezak (2 years ago)
Why do we have a penis?
Noah Shillings (2 years ago)
That's not true humans don't start as female. They are gender neutral. And they don't get a gender till the x or you chromosome from the sperm cell kicks in.
Jnas X (2 years ago)
Idiot, you need your tailbone it is not vestigial. It is not useless. Your tailbone has 9 muscles attached to them, without your tailbone you cannot do some pretty important things. If you really think it is vestigial, I will pay to have yours removed! Don't enforce darwinism with lies!
paranormal lazivity (2 years ago)
harry styles have 4
brandon watkins (2 years ago)
Quick genetics lesson. Cited from "Essentials of genetics 9th edition." Author William s. Klung. Page 88 first paragraph continued from page 87. "During early development, every human embryo undergoes a period when it is potentially hermaphroditic. By the fifth week of gestation, gonadal primordia (the tissue that will form the gonad) arise as a pair of gonadal (genital) ridges associated with each embryonic kidney. the embryo is potentially hermaphroditic at this stage it's gonadal phenotype is sexually indifferent-male or female reproductive structures cannot be distinguished, and the gonadal ridge tissue can develop to form male or female gonads. primordial germ cells migrate to these ridges, where an outer cortex and inner medulla form (outer and inner parts of an organ). The cortex is then able to develop into an ovary, while the medulla may develop into a testis. In addition, two sets of undifferentiated ducts called the wolffian and mullerian ducts exist in each embryonic. wolffian ducts differentiate into other organs of the male reproductive tract, while mullerian ducts differentiate into structures of the female reproductive tract." Now for a quick summary on what causes the male or female reproductive structures to be expressed. basically, it comes down to the SRY gene, this is located on the Y chromosome and at the seventh week the gene express itself and development of the medulla into a testis starts. If there is no Sry gene then the Mullerian ducts form the fallopian tubes, uterus, cervix and so on. many organs of the male and female anatomy are homologous in that they derived from the same structures. examples: The penis and clit are formed from the same basic structure, ovaries and testis you see the trend. like so people can see (never thought I'd say that lol..)
Leathurkatt (2 years ago)
Guy's nipples are also quite sensitive and fun to play with. XD Just saying, from a girl's perspective.
switchblade (2 years ago)
When I squeeze my black nipples, liquid comes out, and I'm male.
darkduck2000 (2 years ago)
NovaSpiritz there's a good chance that means you have a disease or a hormone imbalance, you might be okay but I'd definitely get it checked out of I were you.
Ellen Nymo (2 years ago)
NovaSpiritz it can be a sign of breast cancer so you better look it up
Timothy Tamrel (2 years ago)
Sci show asking the real questions here
The Domanation (2 years ago)
Are you trying to assume the gender of the entire human population?
Bick Leigh (2 years ago)
Well spin my nipple nuts and send me to Alaska!
zakaria kais (2 years ago)
i feel like chandler with the third nipple omg
Markimus (2 years ago)
I just learnt I have a third nipple and that's not a mole... o-o
Plus...isn't it a fact that men like to have nipples so other people they allow can 'stroke' them? There is the reason!
Daggeress (2 years ago)
could u imagine a world where men don't have nipples?
Monica Colling (2 years ago)
another FYI, with the right hormones taken and nipple stimulation a male can lactate. Also a sign of problems, too.
Margaret Stewart (2 years ago)
Saw nipples on my male cat today. I have had him for 15 years and I had never seen them. Now I am here. Thanks for the info!
yoe91 (2 years ago)
loves the sound of his voice. Interesting info, but did you have to enunciate like a bish like that ?
NeverlostatBSgaming (2 years ago)
There will always be more nipples than people
Chinmaya (2 years ago)
2:02 I said PTHRP out loud. Like that.
Contingence (2 years ago)
Pec caps, Hank? And you think breeding with Neandertals is weird? No, man. You're fucking weird.
LIKEABO$$ (2 years ago)
i was watching this at work with the volume all the way up. all my coworkers heard was "NIPPLES" and then the screen froze due to loading.
RIGOR MORTIS (2 years ago)
Why men have nipples? its simple, We humans are mammals. amphibians and reptiles dont have it whether male or female.
Da Dude (2 years ago)
funny fact. the clitoris is a penis that stops evolving in the embryo.
Akaboy4life (2 years ago)
I have one nipple bigger then the other
Best Username Ever Omg (2 years ago)
MorteWulfe (2 years ago)
Hell think about it, the scrotum is basically an inverted vag and testes are ovaries that like to, in the words of Lil Jon, get low...
MorteWulfe (2 years ago)
Benign!?!?! Take it you never got a titty twister....
William Hunter (2 years ago)
Put simply, the default form is female. It is only when one leg of one X chromosome is discarded that we get a male. I suppose that if we want to make a politically correct statement about us males we would say that males are genetically challenged. LOL. Funny, but true. I know this will make some guys heads explode. Then again, maybe not. Guys like that won't watch this video or stay awake in science class. Now that right there, that's what's really funny.
Brian Koehler (2 years ago)
Sure! It was thought that there is an evolutionary trend that the Y chromosome is losing genes and becoming smaller. Some scientists found that perhaps the Y chromosome was as big as the X chromosome and that it was losing genes over time. They speculated that the Y chromosome may entirely degrade over time (hence extinction of males). A better explanation is that the Y chromosome is losing unnecessary function and its not likely to ever lose its critical function (that is passing down maleness). Therefore, men will be the long time companion of women for some time longer.
William Hunter (2 years ago)
Brian Koehler, thanks for clarification. I was trying to keep it short (no pun intended) and sweet. It's been a few years since I've studied genetics. Fact is, my last read on the subject (probably 20 yrs. ago? the months fly by like days at my age) was Bryan Sykes, Adam's Curse, which brings me back to your comment about serious consequences for the male of our species. If I remember correctly, Sykes said, basically, that he didn't expect to see males survive the females of the species. (The end is near for us. We're going the way of the whiptail lizard apparently.) He gave us about 125k years at best. Can you elaborate briefly on that?
Brian Koehler (2 years ago)
That's not quite true. The Y chromosome isn't just an X chromosome without a leg. If it were, that would be called deletion and it would have serious consequences. The Y chromosome is actually quite different than the X chromosome but are the only two dissimilar chromosomes that pair up during meiosis. The Y chromosome carries some copies of genes that are on the X chromosome as well as genes responsible for gender. It is true that the Y chromosome is much shorter and contains far fewer genes than the X chromosome, but it is still a complete chromosome.
Ru Drisi (2 years ago)
Men also have milk glands . . . and get breast cancer.
Leathurkatt (2 years ago)
And under the right conditions, can be induced to lactate.
Anton flyg (2 years ago)
We learn something new eveyday
Sueños Del Paraíso (2 years ago)
I dont have nipples ._. I has no life
JesusAndTacos (2 years ago)
When Doctor Who talks about how Weeping Angels exist because of quantum mechanical ideals, they are not totally BSing. Recently I made a theory about why Weeping Angels freeze when observed due to quantum reasons.
Harvey Chapman (2 years ago)
Hhhmmm sounds convincing......also nipples are an erogenous zone! would explain moreso but there are many discussions to come from this!
The Poverty Soldier (2 years ago)
Thank you SciShow that was very interesting.
Lord Sandwich (2 years ago)
No, human embryos do not start off as female. ¬.¬ From a genetic perspective, they are always either male or female, as determined by the chromosomes, and from a phenotypical perspective they are genderless!
OneArmedBandit (2 years ago)
OH NO... the attack helicopter gendered people and the crazed feminists/ etc.. will have a field day with this video... your being "SO INSENSITIVE!" HOW DARE YOU say that there is ONLY 2 genders! (lololol)
Cueball (2 years ago)
hehe, whydomenhavenipples is a great artist
Creeps (2 years ago)
one time at school i accidentally cut my shirt a little too close to my nips and for the whole day i wish i didn't have nipples
Coffee Jack (2 years ago)
Men have nipples because we also want to be milked like the baad cow we are.
ChaoticMemmorys (2 years ago)
I'm a guy but I don't have "Moles"...IM SPECIAL OoO
Alex mora (2 years ago)
I love man nipples
nomnom moon (2 years ago)
i always thinking nipples are still essential for men because if dont, there is only 50% chance baby girls will have nipples. so i think i dont want to see a girl who doesnt have nipples anytime soon.
tree guy (2 years ago)
the only purpose of a man nipple is literally cancer
LX arts (2 years ago)
That moment when you realize men should wear bras
J Cortese (2 years ago)
They're there for aesthetic reasons. They break up the blankness of the male chest. :-)
The Techy (2 years ago)
1:23 I am pretty sure every guy looked at there chest at that moment.
TheRomanRuler (2 years ago)
We have nipples becouse long before birth everyone was female. Then others evolved further and grew up while some were stuck as females. OAAAAAHHH shots fired! Look chaps, don´t take this too seriouselly, women and men invidually are no superior to each other, it is together when we are perfect. No need for men vs female argument, both are needed.

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