Why do men have nipples: pseudoscientific version
Immediately is to say that the question "Why do men have nipples?" of modern scientists can not yet give an exact answer. However, there are a few common and incorrect versions.
The male nipple is an erogenous zone, which performs the function of arousal in sex. How reliable is this answer? If you conduct a survey among the representatives of the stronger sex, you can hear a variety of responses – both positive and negative, and neutral. Not all men are Horny when their nipples are caressed. Some touching this part of the chest can cause a different feeling, from disgust to irritation.
Nipples need men for beauty. This stereotype historically in the minds of many people. In most cases, the laws of nature are not aimed at aesthetics, and all the human organs and the appearance of his body more "work" to ensure viability and survival. To represent the male chest without nipples very hard. At least in the human mind the man with no nipples looks unsightly. However, this version is unlikely to justify the presence of male nipples.
This part of the body need a man in order to fight with the enemy to cause him severe pain and humiliation. It is known that sensitive nipples – quite vulnerable and painful area. In addition, the infliction of pain and a feeling of weakness in the understanding of the representatives of the stronger sex is, in its way, the humiliation. Hardly what a man likes when his nipples begin to twist, pinching or biting. However, on the body there is a lot more painful and vulnerable places, injuries which can bring not only unbearable pain, but disruption of the functioning of vital organs. Such vulnerable zones on the male body include the penis and groin area.
The following answer to the question "Why do men have nipples?" is a mythical origin. According to this version, the first humans were hermaphrodites who have purchased sexual characteristics after a while. All hermaphrodites had Breasts, but in males it has ceased to grow because of uselessness and remained in the form of nipples. However, this version also has no scientific justification.
According to an earlier scientific theory, the original purpose of the male nipple is breast-fed offspring. This version was based on the fact that the female and male mammary glands have similar structure, therefore we can draw an analogy between their functional purpose.
Proponents of this theory argued that in the evolution of feeding offspring, Breasts of males was not required, and because of this, the mammary glands in men ceased to grow. But if you look at other mammals, for example primates, we can say that males never had the function of "nurse." Therefore this version is considered incorrect.
Why do men have nipples: scientific version
Here is another answer. 10-15 weeks of fetal development, embryos still do not have gender differences. And only at this time there is a change of hormonal background, and then, on the basis of girl or boy is a fruit, there is also a change in gender. The nipples themselves are formed much earlier than appears to change the hormonal background.
This research explains why men have nipples appear, but not able to accurately answer the question of why the representative of the stronger sex they need.