why do guys have nipples?

[QuickQuart]

Women have nipples so they can transfer milk from their boobs to their babies. So why do men have them??? It seems pointless.

[Truth]

Because they make it so it isnt skin all over your chest, that'd look weird. =]

[keithp318]

Actually we're all born female and they grow until it's decided you're a guy, then it stops. That's it in a nutshell.


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I didn't know nuts had shells

[Odin]

Thats a good one!

4 me it seems pointless.

[Spunky]

Actually we're all born female and they grow until it's decided you're a guy, then it stops. That's it in a nutshell.


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I didn't know nuts had shells

Yea when you are consived you gender is unknown and you body starts forming as a girl until your genes form as a boy.

[Patchy]

Actually we're all born female and they grow until it's decided you're a guy, then it stops. That's it in a nutshell.



Thats spot on, I wish I paid more attention to biology in 2nd year cause then I would probs know how to explain the XX and XY chromosomes better do you (female and male)

But as Keith said your body starts live as a Female chromosome then develops to a male chromosomes.

[MisterAndrews]

We learnt that the sex chromosomes are pair 23, the last pair to be coded. The other 22 pairs dont have a gender coding, so everyone is made in the same way until pair 23 are coded. You don't begin as female, you begin genderless.

[nicetomeetyou]

We learnt that the sex chromosomes are pair 23, the last pair to be coded. The other 22 pairs dont have a gender coding, so everyone is made in the same way until pair 23 are coded. You don't begin as female, you begin genderless.

Yep thats right. I have learnt that aswell. lol :D

[Donkey]

Without the science jargon:

When you start off, you're not assigned to a gender. You develop nipples very early. Later, you are assigned a gender and you already have nipples. It's that simple.

[Stark]

Like keithp318 said, all vertebrae embryos are originally female, and by the time the extra hormone is added for the embryo to form the male parts, the nipples are already formed... they are useless though.

[byee]

Well, a lot of very interesting theories, but here's the answer.

Guys have nipples b/c all humans do. Actually, all mammals do regardless of gender. Girls just work a bit differrently than ours (obviously).

At conception (the moment when the sperm penetrates the egg), the sex of the fetus is determined. There are 2 types of sperm: 'X' chromosome (which produce a female, and look rounder under a microscope), and 'Y' chromosome (which produce a male, and look longer and slender under a microscope). The girl's egg only has an 'X' chromosome, so the gender of the baby is completely determined by the guys sperm and which chromosome (the 21st, actually) it carries. And, this occurs at fertilization, the sex is fixed at that moment, but development is guided by many hormones released throughout early development.

With me so far?

OK, during development the embryo produces one of two inhibiting substances, called 'Wolferian' and 'Mullerian'. As I recall, 'XX' embryos release Wolferian, and 'XY' release Mullerian. The purpose of these chemicals is to inhibit the growth of the *other* gender's sexual parts.

So, a girl's nipples develop (along with the genitals) in a typically female way, and ours develop as they're supposed to. Minus the breast development, but the nipples remain as an artifact.

OK?

[devilsheep]

Without the science jargon:

When you start off, you're not assigned to a gender. You develop nipples very early. Later, you are assigned a gender and you already have nipples. It's that simple.

Hmm that's interesting. Never knew that

[wavey]

Hello, interesting topic i have come across, yes it is true everybody has niples, and in later growth in the womb your body decides the sex gender.

[AutumnDae]

Without the science jargon:

When you start off, you're not assigned to a gender. You develop nipples very early. Later, you are assigned a gender and you already have nipples. It's that simple.

We learnt that the sex chromosomes are pair 23, the last pair to be coded. The other 22 pairs dont have a gender coding, so everyone is made in the same way until pair 23 are coded. You don't begin as female, you begin genderless.
I never learned it this way in Biology class. I learned it this way:

Well, a lot of very interesting theories, but here's the answer.

Guys have nipples b/c all humans do. Actually, all mammals do regardless of gender. Girls just work a bit differrently than ours (obviously).

At conception (the moment when the sperm penetrates the egg), the sex of the fetus is determined. There are 2 types of sperm: 'X' chromosome (which produce a female, and look rounder under a microscope), and 'Y' chromosome (which produce a male, and look longer and slender under a microscope). The girl's egg only has an 'X' chromosome, so the gender of the baby is completely determined by the guys sperm and which chromosome (the 21st, actually) it carries. And, this occurs at fertilization, the sex is fixed at that moment, but development is guided by many hormones released throughout early development.

With me so far?

OK, during development the embryo produces one of two inhibiting substances, called 'Wolferian' and 'Mullerian'. As I recall, 'XX' embryos release Wolferian, and 'XY' release Mullerian. The purpose of these chemicals is to inhibit the growth of the *other* gender's sexual parts.

So, a girl's nipples develop (along with the genitals) in a typically female way, and ours develop as they're supposed to. Minus the breast development, but the nipples remain as an artifact.

OK?

I'm assuming this is correct. This is exactly how my teacher explained it last year.

[Oblivion]

Well, a lot of very interesting theories, but here's the answer.

Guys have nipples b/c all humans do. Actually, all mammals do regardless of gender. Girls just work a bit differrently than ours (obviously).

At conception (the moment when the sperm penetrates the egg), the sex of the fetus is determined. There are 2 types of sperm: 'X' chromosome (which produce a female, and look rounder under a microscope), and 'Y' chromosome (which produce a male, and look longer and slender under a microscope). The girl's egg only has an 'X' chromosome, so the gender of the baby is completely determined by the guys sperm and which chromosome (the 21st, actually) it carries. And, this occurs at fertilization, the sex is fixed at that moment, but development is guided by many hormones released throughout early development.

With me so far?

OK, during development the embryo produces one of two inhibiting substances, called 'Wolferian' and 'Mullerian'. As I recall, 'XX' embryos release Wolferian, and 'XY' release Mullerian. The purpose of these chemicals is to inhibit the growth of the *other* gender's sexual parts.

So, a girl's nipples develop (along with the genitals) in a typically female way, and ours develop as they're supposed to. Minus the breast development, but the nipples remain as an artifact.

OK?

That's what I was taught as well.
As soon as the sperm enters the egg, you are either a female under construction, or a male under construction.
I don't think it really has to do with us being genderless at first, since we all technically are gendered as soon as either the X or Y chromosome sperm enters the female (X) egg.

[byee]

That's what I was taught as well.
As soon as the sperm enters the egg, you are either a female under construction, or a male under construction.
I don't think it really has to do with us being genderless at first, since we all technically are gendered as soon as either the X or Y chromosome sperm enters the female (X) egg.

I never learned it this way in Biology class. I learned it this way:

*Phew*! Thanks for the reality check.

Gender is determined at the moment of conception. It takes a while in there for it to be developed, for the parts to form. But what makes us boys or girls isn't determined just by genital development (which is later), it's the composition of the 21st chromosome (which is inserted into the egg at conception).



I'm assuming this is correct. This is exactly how my teacher explained it last year.

Thanks for the reality check.

Gender is determined at the moment of conception. It takes a while in there for it to be developed, for the parts to form. But what makes us boys or girls isn't determined just by genital development (which is later), it's the composition of the 21st chromosome (which is inserted into the egg at conception).

[Donkey]

I was taught it like I said it :)

[mexa]

Because they make it so it isnt skin all over your chest, that'd look weird. =]

I dont know but if youve watched cartoons the male characters are often pretty plain on the chest and it doesnt look weird...as for the why to nipples...i have no idea time to google it haha

[Bobfrank543]

Its amazing how everybody starts out as a girl, we would look weird without nipples if this change was made today though

[AutumnDae]

Its amazing how everybody starts out as a girl, we would look weird without nipples if this change was made today though

I'm sure that would be amazing - if that were true. See Sam's (IAMSAM) post for the explanation.