Why do men have nipples?
470611
for piercing and sucking
37638
please read the book entitled why do men have nipples\n\nthat will tell you why. It involves bacteria i think.
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.
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.
961170
All fetuses start out essentially female before they develop into male or female, hence the nipples.
602450
Without Nipples the Male Chest Looks Strange.  The nipples provide a focus point for the male chest. They direct the eye to the curve of the pectoral muscle. \n\nMen and women are mammals (from the Latin mamma breast) a species that have breasts and feeds its young with milk. The human embryo has tissue that will evolve into breasts. Both male and female babies are born with nipples and ducts intact. It is the presence of genes that direct hormones to differentiate the breast tissue. The Y chromosome stimulates hormones such as testosterone to form male features.\n\nInsufficient or defective testosterone, poor tissue responsiveness, or an unbalance of other hormones like Estrogen and Prolactin can cause female like breasts even in men (Gynecomastia). At birth, the small amount of the mother's estrogen in the baby can result in small breasts that usually resolve. There can be an inbalance of hormones during male puberty that can result in temporary breast growth, which for most resolves. There are many medical problems and drugs that can cause male breast growth. \n \nThe nipple is actually the central protrusion inside of the pigmented areola. There is a thin muscle just under the skin that when stimulated, tends to flatten the puffed male nipple areola. This muscle when stimulated in a breast feeding woman, projects the nipple for the baby. Nerves that innervate the nipple / areola can produce pleasure for both men and women.
264259
The reason is a mix of physiological responses. However primarily the nipple's purpose is to provide milk to a potential infant. So, following this line of thought one can speculate that even if you were to consider it an erotic response, underneath it all it is just a physiological reaction to allow a potential infant to find its source of food. Crazy isn't it? Also here's something I found from Wikipedia.org - \n\n"Stimulation or sexual arousal can cause the nipples to become erect. Breastfeeding or exposure to cold temperatures often have this effect as well. Pregnancy and nursing tend to increase nipple size somewhat, and this increase may remain permanently thereafter. Small non-striated myocytes (muscle cells) arranged cylindrically within the nipple are responsible for this erection of the nipples."
72748
Why Men Have Nipples\n\nFor the most part, nipples are on men's chests not for ornamentation, but because we all initially originate from the same kinds of tissues. By Louanne Cole Weston, PhD\n  \n\nMales and females, though very different, have a great deal in common. In the earliest part of our embryonic development, we all start out much the same. Though the sex of an embryo is determined when sperm meets egg, the genital anatomy of males and females cannot be visually distinguished with the use of ultrasound until the 15th week of pregnancy. \n\n\nFrom the beginning, we all have the tissues that later develop into functioning parts, depending on whether we are genetically coded to be male or female. (The genetic coding that leads to people who have both male and female anatomical traits is much more complex than we'll get into here.) \n\n\nMales have nipples because they develop with the capacity to be female should their chromosomes dictate. Females call upon this capacity when they hit puberty and their breasts develop. Later, if they become pregnant, they call upon it again as milk is created in their breasts. Generally, males do not have a reason for the nipple to function, although, from time to time, adolescent and adult males develop a condition called gynecomastia, in which hormonal levels fool the breasts into beginning to develop. \n\n\nBut for the most part, nipples are on men's chests not for ornamentation, but because we all initially originate from the same kinds of tissues. Males just don't need their breast tissue to be a functioning part of their anatomy
392368
Men's nipples don't have a purpose.  When a baby is developing in the uterus, they all start out as female, hence the nipples developing.  Basically in order for a male to develop from there is a genetic fluke which sends signals to start developing male organs.  The only sign that is left that all men started as females at the most basic level of life is the nipples.\n\nFascinating, huh?
466168
because males MAY use them as stimulation receptors, they aren't ruled out by evolution\nso infact that are used, just not like females use them (think about it, if a male has nipples and uses them this way, then he would be able to spread his charateristic to more females thereby increasing the popularity and favorability of the trait)\nas for the question of why they there in the first place...\nits one of those characteristics that are kept when the baby is developing in the womb
962912
you should read the book why do men have nipples.  it askes a similar question and a doctor answers it.
184664
Nipples are an erogenous zone for both men and women.
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.
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.
868669
The female breasts have been associated more sexual function, than nutritional function.  Nudity and sex in the United States have become taboo in the public forum.  The female breasts, whose function is non-sexual, has taken on a sexual status. AND, since sexually charged items are highly censored on all public media forums in the United States, a woman's breast is considered to controversial for all ages public viewing.  So if a 7 year old child is watching Dr. 90210 with her mother she might be scarred by the sight of female breasts.  (Or so the censors believe). \n\nTo answer your second questions all humans(including men), have nipples to prove that humans are mammals. Remember that the distinguishing features of mammals, from whales to mice, are two: having hair and nursing their offspring. Granted the male of our species can not nurse, but thosenipples are there to remind us what species men are....and to let women know when men are cold (lol)
558372
Nice decent women do not like for their nipples to show through except in the bedroom.\n\nIt is a natural effect caused by cool breeze, shirt rubbing against them, and from being horny.
3475
Because in the womb, we develop equally until a certain point where our respective genders become more apparent. The period before this is when men grow nipples.\n\nBesides, can you imagine life without your nipples? A bleak world indeed.