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Nipple - Male nipples | | Nipple - Male nipples: Encyclopedia II - Nipple - Male nipples | | Male nipples were for a long time considered a biological mystery, since they appeared not to serve any direct biological function, and so their development appeared to present a problem for the theory of evolution.
Modern biology now regards the existence of male nipples as being consistent with the theory of evolution. Indeed, the development of male nipples may be regarded as a good example of both the mechanisms by which evolution of the genome expresses itself in the phenotype, and the undirec ...
See also:Nipple, Nipple - Anatomy, Nipple - Male nipples | | | Nipple, Nipple - Anatomy, Nipple - Male nipples, List of sexology topics : Areola, Breast, Erection, Male lactation, Masters and Johnson, Masturbation, Nudity, Sex organ, Sexual arousal, Biological development : Breastfeeding, Infant, Oxytocin, Prolactin, Supernumerary (third) nipple, Tit, Wet nurse, Witch's milk, Modification methods : Nipple piercing, Body nullification, Jewellery, Other : Nipplegate, Slippery Nipple (a cocktail)., Nipple cripple - a game | | |
| | | Nipple: Encyclopedia II - Nipple - Male nipples
Nipple - Male nipples
Male nipples were for a long time considered a biological mystery, since they appeared not to serve any direct biological function, and so their development appeared to present a problem for the theory of evolution.
Modern biology now regards the existence of male nipples as being consistent with the theory of evolution. Indeed, the development of male nipples may be regarded as a good example of both the mechanisms by which evolution of the genome expresses itself in the phenotype, and the undirected and contingent nature of evolution.
According to this viewpoint, male nipples exist because they are homologous to female nipples, which originate from the same overall genetic and developmental blueprint as male nipples. Female nipples have evolved to support lactation, but there is no biological advantage to changing the male body plan to eliminate them.
Human male nipples do have secondary biological function; like female nipples, they are sensitive to touch (but less so), and can trigger sexual arousal.
Other related archivesAreola, Body nullification, Breast, Breastfeeding, Embryologically, Erection, Infant, Jewellery, List of sexology topics, Male lactation, Masters and Johnson, Masturbation, Nipple cripple, Nipple piercing, Nipplegate, Nudity, Oxytocin, Prolactin, Sex organ, Sexual arousal, Slippery Nipple, Supernumerary (third) nipple, Tit, Wet nurse, Witch's milk, anatomy, areola, axilla, babies, breastfeeding, breasts, cocktail, estrogens, genome, homologous, human, lactation, lactiferous ducts, male, male lactation, mammals, mammary glands, milk, milk lines, myocytes, phenotype, platypus, pubis, sex organs, sexual arousal, skin, sucking, supernumerary nipples, theory of evolution, witch's milk
 Adapted from the Wikipedia article "Male nipples", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki |
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