What is the evolutionary purpose of nipples on men? - GoFuckYourself.com

Jet - BANNED FOR LIFE · 03-20-2008, 06:35 AM

what biological function do they serve?

cranki · 03-20-2008, 06:38 AM

getting sucked on

DutchTeenCash · 03-20-2008, 06:38 AM

none

its just something thats there

heres the why and how

To tell you the truth, nobody really knows. The best explanation I've been able to find (and frankly it doesn't explain very much) is that nipples aren't a sex-linked characteristic. In other words, nipples are just one of those sexually neutral pieces of equipment, like arms or brains, that humans get regardless of sex.

As you may know, every human being gets a unique set of 23 pairs of chromosomes at conception. These fall into two categories. One pair of chromosomes determines sex--the XX combination means you become female, the XY combination means you become male.

The other 22 pairs, the non-sex chromosomes (they're called autosomes), supply what we might call the standard equipment that all humans get. These 22 pairs constitute an all-purpose genetic blueprint that in effect is programmed for either maleness or femaleness by the sex chromosomes. The programming is done by the hormones secreted by the sex glands.

For example, the autosomes give you a voice box, while the sex hormones determine whether it's going to be a deep male voice or a high female voice. Similarly, the autosomes give you nipples, and the sex hormones determine whether said nipples are going to be functioning (in females) or not (in males).

One interesting consequence of the developmental set-up just described is that during the very early stages of fetal life, before the sex hormones have had a chance to do their stuff, all humans are basically bisexual. Among other things, you have two sets of primitive plumbing--one male, one female. Only one set develops into a mature urogenital system, but you retain traces of the other for the rest of your life.

It's tempting, therefore, to say that male nipples are yet another vestige of your carefree bisexual youth. Trouble is, male nipples are hardly vestigial. They're full-sized and fully equipped with blood vessels, nerves, and all the usual appurtenances of functioning organs. Why this should be so nobody knows--in some other mammals, such as rats and mice, male nipple development is completely suppressed by the male sex hormones. (Incidentally, don't start thinking that at one time our human male ancestors must have suckled their young. So far as anybody knows, male lactation has never developed in any mammalian species.)

Human nipples appear in the third or fourth week of development, well before the sex characteristics. (The sex hormones start to assert themselves at seven weeks.) As many as seven pairs of nipples are arranged along either side of a "milk line," a ridge of skin that runs from the upper chest to the navel.

Normally only one pair amounts to anything, but on about one baby in a hundred you can detect some vestige of the other ones, usually on the order of a freckle. There are cases of women who ended up with an extra breast, which made them freak show candidates not so many years ago. Luckily today the women can avail themselves of corrective surgery while the rest of us can watch Jenny Jones.

Anyway, both male and female babies are born with the main milk ducts intact--the gland that produces milk is there in the male, but it remains undeveloped unless stimulated by the female hormone, estrogen. Occasionally, a male baby is born with enough of his mother's estrogen in his body to produce a bizarre phenomenon known as "witches' milk," with the male glands, suitably stimulated, pumping away at the moment of birth.

In the adult male, the dormant glands can still be revived by a sufficient dose of estrogen. Actual lactation is rare--only a couple cases have been recorded. But at least one writer (Daly, 1978) has suggested that the "physiological impediments to the evolution of male lactation do not seem individually surmountable." Meaning we may yet see the dawn of the truly liberated household.

RadiantX · 03-20-2008, 06:41 AM

Im pretty sure all humans start off as female. In fetal development the SRY gene causes the fetal gonads to become testes, while the absence of it allows the gonads to continue to develop into ovaries. So both sexes end up sharing some traits regardless if theyre useful or not.

ADL Colin · 03-20-2008, 06:41 AM

Where else would you put a nipple ring?

ADL Colin · 03-20-2008, 07:05 AM

ADL Colin · 03-20-2008, 07:06 AM

Iron Fist · 03-20-2008, 07:09 AM

Quote:

Originally Posted by RadiantX

Im pretty sure all humans start off as female. In fetal development the SRY gene causes the fetal gonads to become testes, while the absence of it allows the gonads to continue to develop into ovaries. So both sexes end up sharing some traits regardless if theyre useful or not.

The mystery behind crossdressing has just been solved.

ChatCash_Rob · 03-20-2008, 08:57 AM

you can milk a cat

Jet - BANNED FOR LIFE · 03-20-2008, 09:02 AM

Quote:

Originally Posted by LiveBucks_Rob

you can milk a cat

Male cat?

tranza · 03-20-2008, 09:12 AM

Pretty much useless.

Poindexterity · 03-20-2008, 09:20 PM

Once we develop out natural ability of mental pyrokinesis, we will
learn that the previously unused gland that controls it resides inside
the male nipple.

AdPatron · 03-20-2008, 09:31 PM

Quote:

Originally Posted by ADL Colin

D Ghost · 03-20-2008, 09:36 PM

Quote:

Originally Posted by DutchTeenCash

none

its just something thats there

heres the why and how

To tell you the truth, nobody really knows. The best explanation I've been able to find (and frankly it doesn't explain very much) is that nipples aren't a sex-linked characteristic. In other words, nipples are just one of those sexually neutral pieces of equipment, like arms or brains, that humans get regardless of sex.

As you may know, every human being gets a unique set of 23 pairs of chromosomes at conception. These fall into two categories. One pair of chromosomes determines sex--the XX combination means you become female, the XY combination means you become male.

The other 22 pairs, the non-sex chromosomes (they're called autosomes), supply what we might call the standard equipment that all humans get. These 22 pairs constitute an all-purpose genetic blueprint that in effect is programmed for either maleness or femaleness by the sex chromosomes. The programming is done by the hormones secreted by the sex glands.

For example, the autosomes give you a voice box, while the sex hormones determine whether it's going to be a deep male voice or a high female voice. Similarly, the autosomes give you nipples, and the sex hormones determine whether said nipples are going to be functioning (in females) or not (in males).

One interesting consequence of the developmental set-up just described is that during the very early stages of fetal life, before the sex hormones have had a chance to do their stuff, all humans are basically bisexual. Among other things, you have two sets of primitive plumbing--one male, one female. Only one set develops into a mature urogenital system, but you retain traces of the other for the rest of your life.

It's tempting, therefore, to say that male nipples are yet another vestige of your carefree bisexual youth. Trouble is, male nipples are hardly vestigial. They're full-sized and fully equipped with blood vessels, nerves, and all the usual appurtenances of functioning organs. Why this should be so nobody knows--in some other mammals, such as rats and mice, male nipple development is completely suppressed by the male sex hormones. (Incidentally, don't start thinking that at one time our human male ancestors must have suckled their young. So far as anybody knows, male lactation has never developed in any mammalian species.)

Human nipples appear in the third or fourth week of development, well before the sex characteristics. (The sex hormones start to assert themselves at seven weeks.) As many as seven pairs of nipples are arranged along either side of a "milk line," a ridge of skin that runs from the upper chest to the navel.

Normally only one pair amounts to anything, but on about one baby in a hundred you can detect some vestige of the other ones, usually on the order of a freckle. There are cases of women who ended up with an extra breast, which made them freak show candidates not so many years ago. Luckily today the women can avail themselves of corrective surgery while the rest of us can watch Jenny Jones.

Anyway, both male and female babies are born with the main milk ducts intact--the gland that produces milk is there in the male, but it remains undeveloped unless stimulated by the female hormone, estrogen. Occasionally, a male baby is born with enough of his mother's estrogen in his body to produce a bizarre phenomenon known as "witches' milk," with the male glands, suitably stimulated, pumping away at the moment of birth.

In the adult male, the dormant glands can still be revived by a sufficient dose of estrogen. Actual lactation is rare--only a couple cases have been recorded. But at least one writer (Daly, 1978) has suggested that the "physiological impediments to the evolution of male lactation do not seem individually surmountable." Meaning we may yet see the dawn of the truly liberated household.

Thank you doctor

Spunky · 03-20-2008, 09:41 PM

Chicks dig hairy ones

Chio · 03-20-2008, 11:43 PM

Funny book that answers this (Sorta).

03-20-2008, 06:35 AM	#1
Jet - BANNED FOR LIFE So Fucking Banned Join Date: Sep 2002 Posts: 7,515	What is the evolutionary purpose of nipples on men? what biological function do they serve?

03-20-2008, 06:38 AM	#3
DutchTeenCash I like Dutch Girls Join Date: Feb 2003 Location: dutchteencash.com Posts: 21,684	none its just something thats there heres the why and how To tell you the truth, nobody really knows. The best explanation I've been able to find (and frankly it doesn't explain very much) is that nipples aren't a sex-linked characteristic. In other words, nipples are just one of those sexually neutral pieces of equipment, like arms or brains, that humans get regardless of sex. As you may know, every human being gets a unique set of 23 pairs of chromosomes at conception. These fall into two categories. One pair of chromosomes determines sex--the XX combination means you become female, the XY combination means you become male. The other 22 pairs, the non-sex chromosomes (they're called autosomes), supply what we might call the standard equipment that all humans get. These 22 pairs constitute an all-purpose genetic blueprint that in effect is programmed for either maleness or femaleness by the sex chromosomes. The programming is done by the hormones secreted by the sex glands. For example, the autosomes give you a voice box, while the sex hormones determine whether it's going to be a deep male voice or a high female voice. Similarly, the autosomes give you nipples, and the sex hormones determine whether said nipples are going to be functioning (in females) or not (in males). One interesting consequence of the developmental set-up just described is that during the very early stages of fetal life, before the sex hormones have had a chance to do their stuff, all humans are basically bisexual. Among other things, you have two sets of primitive plumbing--one male, one female. Only one set develops into a mature urogenital system, but you retain traces of the other for the rest of your life. It's tempting, therefore, to say that male nipples are yet another vestige of your carefree bisexual youth. Trouble is, male nipples are hardly vestigial. They're full-sized and fully equipped with blood vessels, nerves, and all the usual appurtenances of functioning organs. Why this should be so nobody knows--in some other mammals, such as rats and mice, male nipple development is completely suppressed by the male sex hormones. (Incidentally, don't start thinking that at one time our human male ancestors must have suckled their young. So far as anybody knows, male lactation has never developed in any mammalian species.) Human nipples appear in the third or fourth week of development, well before the sex characteristics. (The sex hormones start to assert themselves at seven weeks.) As many as seven pairs of nipples are arranged along either side of a "milk line," a ridge of skin that runs from the upper chest to the navel. Normally only one pair amounts to anything, but on about one baby in a hundred you can detect some vestige of the other ones, usually on the order of a freckle. There are cases of women who ended up with an extra breast, which made them freak show candidates not so many years ago. Luckily today the women can avail themselves of corrective surgery while the rest of us can watch Jenny Jones. Anyway, both male and female babies are born with the main milk ducts intact--the gland that produces milk is there in the male, but it remains undeveloped unless stimulated by the female hormone, estrogen. Occasionally, a male baby is born with enough of his mother's estrogen in his body to produce a bizarre phenomenon known as "witches' milk," with the male glands, suitably stimulated, pumping away at the moment of birth. In the adult male, the dormant glands can still be revived by a sufficient dose of estrogen. Actual lactation is rare--only a couple cases have been recorded. But at least one writer (Daly, 1978) has suggested that the "physiological impediments to the evolution of male lactation do not seem individually surmountable." Meaning we may yet see the dawn of the truly liberated household. __________________ ICQ 16 91 547 - SKYPE dutchteencash bob AT dutchteencash DOT com ... did you see our newest Sweet Natural Girl Priscilla (18)?

03-20-2008, 06:41 AM	#5
ADL Colin Too lazy to set a custom title Join Date: Feb 2001 Location: Tube Titans, USA Posts: 11,929	Where else would you put a nipple ring? __________________ Adult Date Link - $50 PPS starting NOW! -- good and JUICY! skype = "adultdatelink"

03-20-2008, 07:05 AM	#6
ADL Colin Too lazy to set a custom title Join Date: Feb 2001 Location: Tube Titans, USA Posts: 11,929	__________________ Adult Date Link - $50 PPS starting NOW! -- good and JUICY! skype = "adultdatelink"

03-20-2008, 07:06 AM	#7
ADL Colin Too lazy to set a custom title Join Date: Feb 2001 Location: Tube Titans, USA Posts: 11,929	__________________ Adult Date Link - $50 PPS starting NOW! -- good and JUICY! skype = "adultdatelink"

03-20-2008, 06:38 AM	#2
cranki Confirmed User Join Date: Feb 2005 Location: Café del Mar Posts: 5,162	getting sucked on

03-20-2008, 06:41 AM	#4
RadiantX Confirmed User Join Date: May 2005 Location: FL Posts: 550	Im pretty sure all humans start off as female. In fetal development the SRY gene causes the fetal gonads to become testes, while the absence of it allows the gonads to continue to develop into ovaries. So both sexes end up sharing some traits regardless if theyre useful or not.

03-20-2008, 08:57 AM	#9
ChatCash_Rob Confirmed User Industry Role: Join Date: Apr 2004 Posts: 749	you can milk a cat __________________ www.chatcash.com ...coming soon! icq # 131127104 rob{AT}chatcash

03-20-2008, 09:12 AM	#11
tranza ICQ: 197-556-237 Join Date: Jun 2003 Location: BRASIL !!! Posts: 57,559	Pretty much useless. __________________ I'm just a newbie.

03-20-2008, 09:20 PM	#12
Poindexterity Confirmed User Industry Role: Join Date: Feb 2008 Location: America's butthole, TX Posts: 882	Once we develop out natural ability of mental pyrokinesis, we will learn that the previously unused gland that controls it resides inside the male nipple.

03-20-2008, 09:41 PM	#15
Spunky I need a beer Industry Role: Join Date: Jun 2002 Location: ♠ Toiletville ♠ Posts: 133,944	Chicks dig hairy ones __________________ *YOUR INFORMATION HERE*

03-20-2008, 11:43 PM	#16
Chio Confirmed User Join Date: Oct 2002 Location: ICQ: 39-183769 Posts: 8,002	Funny book that answers this (Sorta). __________________ I seo'd my hair yesterday and today it's pr7! RIP Texas Dreams Are you a content producer or program owner sick of tube sites? Contact me on ICQ: 39-183769