why do men have nipples?

Answer 1

In the anatomy of mammals, a nipple or mammary papilla is a small projection of skin containing the outlets for 15-20 lactiferous ducts arranged cylindrically around the tip. The skin of the succulant nipple is rich in a supply of special nerves that are sensitive to certain stimuli. The physiological purpose of nipples is to deliver to the infant milk produced in the female mammary glands during lactation. In the male, nipples are often not considered functional with regard to breastfeeding, although male lactation is possible. Mammalian infants have a rooting instinct for seeking the nipple, and a sucking instinct for extracting milk.

In human anatomy, the two nipples are located near the center of the breasts, surrounded by an area of sensitive, pigmented skin known as the areola. The pigments of the nipple and areola are brown eumelanin (a brown pigment) and to a greater extent pheomelanin (a red pigment). The nipple and areola of males and females can be erotic receptors, or considered sex organs. Stimulation or sexual arousal can cause the nipples to become erect, due to the release of the polypeptide neurotransmitter oxytocin. Breastfeeding or exposure to cold temperatures often has this effect as well. Pregnancy and nursing tend to increase nipple size somewhat, and this increase may remain permanently thereafter. Pregnancy also increases the pigmentation of the nipples. The erection of the nipple is due to its succulence, as well as the cylindrically arranged muscle cells found within it. Some persons also have adult breastfeeding relationships. In many women there are small bulges on the areola, which are called 'montgomerey bodies'.

Embryologically, nipples develop along the 'milk lines' which in humans extend from the axilla (armpit) down to the pubis (groin) on both sides. Other mammals such as cats and dogs develop more nipples along the milk lines, in number generally approximating the average litter size for that species, rounded up to an even number. Most people develop two nipples (one on each breast) but some have supernumerary nipples. Occasionally, these have lactiferous glands attached.

Sometimes, babies (male or female) are born producing milk. This, called 'witch's milk', is caused by maternal estrogens acting on the baby and is quite normal. Witch's milk disappears after several days.

Answer 2

anatomically we all start off very similar when we are still in very early stages of development. Changes start to occur because of teh proteins that are coded for by the Y chromosome that only males have. This is why there are certain similarities between females and males, such as nipples.

Answer 3

When pulling and twisting ears no longer hurt, pull and twist the nipples. OUCH!

Or maybe to level the playing field since ladies have two nipples for guys to nibble on, that way the ladies can nibble on ours.

Answer 4

For your girlfriend to play with. Men's nipples are super sensitive.

Answer 5

Asked 266 times already:

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Answer 6

because all living things have them? Even the dogs, cows all have them . Its just nature. Why not ask why we need hair?

Answer 7

So the trendy ones could pierce them.

Answer 8

to make us more sexier