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In the book "Biological Exuberance: Still, few mammals other than humans mate face-to-face the behavior makes headlines when seen in the wild , so nipple stimulation isn't generally part of the script. We can learn to prefer large breasts," Dettwyler wrote. About 82 percent of women said the same.

Boobies sex vagina hot women


Because the men surveyed from Papua New Guinea hailed from more of a subsistence culture than the men in Samoa or New Zealand, the results support the idea that in places of scarcity, padded bustlines could signal a well-fed woman with reserves for pregnancy and childrearing, the researchers wrote. Of those, nine cultures preferred large breasts. For others, the cause depends on their age and the site of bleeding. When a woman's nipples are stimulated during breastfeeding, the neurochemical oxytocin, otherwise known as the "love drug," floods her brain, helping to focus her attention and affection on her baby. We can learn to prefer long, pendulous breasts, or upright, hemispherical breasts. When a sexual partner touches, massages or nibbles a woman's breasts, Young said, this triggers the release of oxytocin in the woman's brain, just like what happens when a baby nurses. The lining of the uterus is shed and the loss is 50 per cent blood, which can vary from bright red to dark brown. However, less is known about the innervation of nipples in men, studies on how nipple stimulation contributes to their sexual arousal are lacking, the researchers wrote. But in this context, the oxytocin focuses the woman's attention on her sexual partner, strengthening her desire to bond with this person. Hormonal changes Contraception such as the pill, injection or IUD intrauterine device Infection in the vagina or uterus Fibroids or polyps inside the uterus Trauma to the vagina Some medications such as anticoagulants or anti-epilepsy drugs Underlying health problems such as bleeding or thyroid disorders Cancer in the lining of the uterus, the cervix or vagina rare. Evolution has, in a sense, made men want to do this. This pattern can vary with age, stress, diet, exercise and inherited factors. If you suffer from ongoing bleeding problems, see your local doctor for a full assessment to make sure there is no underlying disorder causing the problem. It's a behavior that males have evolved in order to stimulate the female's maternal bonding circuitry. The flow can also vary. Diagnosis methods For some women, medical history and physical examination are enough for the doctor to be able to diagnose the cause of the irregular bleeding. This article was first published on Sept. For one thing, it's not actually clear that breasts are universally adored. But there are pitfalls to this line of work. Young responded that there are not enough studies looking at breast stimulation during foreplay across cultures to rule out the importance of the nipple-oxytocin bonding loop. Male nipples are a vestige of prenatal development in men, but they are hooked up to nerves and blood vessels, just like female nipples. During each monthly cycle, the lining of the womb uterus gets thicker in readiness for pregnancy. Attraction to breasts "is a brain organization effect that occurs in straight males when they go through puberty," Young told Live Science. This is felt just below the navel and may spread into the legs or lower back. Some researchers think that sexual interest in breasts simply hijacks the breastfeeding circuitry and uses it for another purpose.

Boobies sex vagina hot women

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