A person might experience different physical or emotional symptoms if the harmony between these movements is not maintained. The symmetry of a body is a good clue to health and fitness, and seems to be considered important in judging mates in most species, including humans. For other uses, see Breast disambiguation. Breasts, when not lactating, have an important decorative function. In humans, somehow this is reversed: They were able to do this thanks to several advantages, including any or all of the following: In this version of a classic "delayed gratification" also called intertemporal choice by behavioral economists experiment, some men watched videos of pastoral scenes while others watched videos of attractive women with lots of skin exposed running in slo-mo, "Baywatch" style. In other words, division of labour made nulliparous breasts possible. That the same hormone causes women to grow breasts and to grow subcutaneous fat does not explain the fact that women grow breasts. Oxytocin focuses the brain's attention to the partner's face, smell, and voice.
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5 Reasons Men Develop 'Man Boobs'
She would not need large breasts to get her man. Women would have evolved to be fairly lustful only when in a fertile part of their cycle. Women have sexual desires too I have this on excellent authority , and so they would have a motive to achieve this feat, especially after being on the shelf for some while. If she had not the wit to make a man stay with her for many years, copulating with her often, and helping raise her children, she could compensate by at least advertising that she was easy to impregnate. The breasts can decrease in size when the levels of circulating estrogen decline. When a woman produced a child, thus proving herself to be fertile, her mate would only become wary of rivals for her affections when her breasts disappeared. Humans are unique in the animal world, in that they develop breasts at puberty and retain them into old age, whether or not they ever get pregnant. The Psychology of Human Sexuality. But men aren't known for being particularly choosy about sex partners.
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Breasts: The Real Reason Men Love Them
In fact, heredity and a girl's weight mostly determine breast size. A bra can make a girl feel less exposed when she's wearing a light shirt, such as a T-shirt. More often than not, a girl is developing normally and before she knows it, she'll be bra shopping too. This suggests that only women capable of growing symmetrical large breasts, grow large breasts, which fits the idea that they are an advertisement of health. Almost all women can produce enough to feed a child. Women would have evolved permanent breasts before men evolved to find them sexy. As a mammary gland , the breast is composed of differing layers of tissue , predominantly two types: Rather, there's only one neurological explanation, and it has to do with brain mechanisms that promote the powerful bond of a mother to her infant. Both females and males develop breasts from the same embryological tissues. Another odd thing about humans is that their females ovulate on the sly.
Description:They were free to be hampered by non-lactating breasts. In fact, because of sports bras, and dresses and tops that have built-in bras, a girl might not need a training bra or a more traditional bra early on. During lactation all the ape species develop a full breast to store milk. Another limitation on the size of breasts would be that the larger they get, the sooner that gravity will take its toll over time. The basic units of the breast are the terminal duct lobular units TDLUs , which produce the fatty breast milk. Any animal powerful enough to bring down an animal as big as a grown woman, can out-run her so easily that speed of foot is not the issue. What Causes Breasts to Get Bigger? At the sides of the chest, the breast tissue can extend into the axilla armpit , and can reach as far to the back as the latissimus dorsi muscle , extending from the lower back to the humerus bone the longest bone of the upper arm. Introduction to the Language Lessons". Not only that, but a girl's brother might think it's just hysterical to pull it so it snaps against her back.