I have a good question for you, I hope it's not too dumb; men do not brestfeed, so why do they have nipples?
546211
When we are concieved the chromosones dont distinguish between male and female until after the nipples have started to develop.\n\nWith women the cells continue to specialise and produce breast tissue with men they don't.
37638
please read the book entitled why do men have nipples\n\nthat will tell you why. It involves bacteria i think.
13909
I remember hearing it this way:  (in layman's terms) When we are in the womb, the genetics that determine whether we will become a man have not "kicked in" yet. At that time the mammary glands are beginning to develop. Then the "male" codes kick in and stop the process after the nipples have developed. They then become just decorative.
767622
I have inverted nipples...they do come out....they are sensitive thats for sure....sometimes a simple touch will turn you on but a touch too hard will hurt. They are actually more sensitive I believe thats why it's hard to breastfeed when you have inserted nipples.
889565
Reason why male have nipples:\n1. To distinguish that they are mammals.\n2.A human baby inherits one copy of every gene from his or her father and one copy of every gene from his or her mother.\n3. It is the effect of the genes.\n\nReason for spleen:\nSpleen is a purplish-red organ shaped like a loose fist and located in the upper-left part of your abdominal cavity. It had been called "the most ignored and misunderstood of all organs." In ancient times, people believed it was the seat of the emotions, but actually it is an integral part of your immune system.\nJob description includes: \n1.filtering out foreign organisms that infect your blood \n2.removing your old or damaged platelets and red blood cells \n3.storing extra blood and releasing it as needed \n4.forming some types of white blood cells \nIf the spleen can be injured or diseased it can be removed through spleenectomy, you can live without it however,your resistance to infection will be lowered, at least initially. \n\nAppendix\nThe appendix is thought to have descended from an organ in our distant herbivorous ancestors called the cecum (or caecum). The cecum is maintained in modern herbivores, where it houses the bacteria that digest cellulose, a chemically tough carbohydrate that these animals could not otherwise utilize. The human appendix contains no significant number of these bacteria, and cellulose is indigestible to us. It seems likely that the appendix lost this function before our ancestors became recognizably human.\n\nSee my dear, this organs my not be vital as others but to maintain the human body in the state of balance equilibrium.
1030685
None. Males and females are essentially the same during development until a hormonal event causes males to develop male genitalia. Because of this, we have some of the same physical characteristics and thus males have nipples.
360707
Actually yes you can. I don't have sources but I do remember hearing about this back in high school from one of my teachers how a tribe of indiginous people of South America that kept injured men of the tribe useful by having the babies breast feed from the men. If enough suckling action is applied to the nipple, a man's body will actually begin to produce higher levels of estrogen and provide small amounts of milk. \n\nAccording to the study, it took a very long time and would probably not work for other people but since this had been a long practice of the tribe, it worked for them.
126625
Where's your evidence?\n\nWe all start out female (that's the reason guys have nipples). The gender gene kicks in later and we develop into males and females. Suppose any genetic or hormonal conditions which lead to homosexuality kick in after gender is determined? There'd be no more reason to think that ALL women would therefore be bisexual than there would be to say all men were bisexual.
596553
It's a primal thing.  Men see big boobs and wide hips and deep down inside their little minds they think "oooh I bet she could birth some children".  Of course, somewhere along the way this is just dumbed down to "Oooh boobs".  Men are simple dumb creatures like that.  It takes very little to make them happy and keep them that way.
23354
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. \n\nAs 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. \n\nThe 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. \n\nFor 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).\n\nOne 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.\n\nIt'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.)\n\nHuman 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. \n\nNormally 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.\n\nAnyway, 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. \n\nIn 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.
1122905
Before asking that question, you need to understand what evolution is.   Evolution describes genetic change over time in response to environmental selection pressures on a species.  This means that advantageous changes are not weeded out.  In fact, all traits which do not negatively impact survival or reproduction, will not be weeded out.  Nipples on a man fall into this category.  Further, if anything, nipples are PROOF of evolution - In general, all species evolved from a prototype ancestral condition; thus, there exists genotypic and phenotypic similarities between members of a species and between related species.  All mammals have nipples, male or female, because our earliest mammalian ancestor had nipples (in fact, what makes us all "mammals" is the ability to produce milk via "mammary" glands to nurse our young).  Thus, both genders of our species (and all mammalian species) have nipples.  Nipples are a conserved evolutionary trait and are not gender-specific.
1164409
The same reason little kids can go topless.  There is nothing to see.  You see, a woman's breasts are a private, personal thing.  They are all different shapes and sizes, the nipples are MUCH larger than men's (in most cases), and they are used to feed children.\n\nPlus, think about how much you stare at men's pecs compared to how much they stare at your breasts.  Do you really want them to be able to see them any time?
1129775
ALL nipples are sexy (thats' cause I love women so much, \nespecially their breasts). Leave nature alone, I'm sure you're\nbeautiful just as you are.
40121
Men and women both start out the same.  We all have the same parts.  Eventually, men develop testicles and they descend.  Women develop ovaries and they remain in the abdomin.  But by then we all have nipples.  The ovaries produce chemicals that turn those nipples into male enticing and baby fueling glands.  For men, they remain as useless as the day they were born.
637302
Silly question. The question "why do boys wear bra?" would be much more interesting!
1144209
psychologically, the nipple represents the breast, and they do not look completely topless unless you can see the nipple. same reason you dont notice a womans breasts as much untill her nipples get hard....you ate from them for a long time as a child, they hold fasination
645957
All human embryos in the womb look the same externally, until testosterone is either added or not.  If not, the baby will develop physically as a girl, if the testosterone is added, the baby develops physically as a boy.  This is true regardless of the XX or XY chromosome of the baby.  The nipples develop prior to the addition of the testosterone.\n\nThey are there because the child could have developed as a woman, and the only purpose that I can think of that they have for men is perhaps a little thrill when your lover pinches them. :)