Why do nipples get hard when touched?

Breasts are an important sign of female estrus and one of the most important sexual sensitive areas of women. They also play an important role in the life of couples, but people often overlook this point. During the excitement phase of the sexual sensation cycle, the breasts will respond to sexual stimulation to a certain extent. This is because the rich smooth muscle fibers in the nipples will contract independently after sexual stimulation.

Under sufficient stimulation, the actual volume of the breast will continue to increase, which is the result of superficial venous hematoma of the breast. When women in sexual excitement have an orgasm, the swelling under the hanging breast is easier to observe. If the woman lies on her back, the overall increase in breast volume will be more obvious. Significant papillary hematoma can be seen at the end of the excitement.

Before a woman experiences the last rush of sexual desire, the breast size of a woman who has not breastfed may increase by 1/5-1/4 compared to normal. The breasts of a woman who has breastfed will also change, but the volume will not continue to increase. This difference may be due to the increased venous separation in breasts that have been fed during the milk conversion process. The baby's sucking increases the separation of the veins and tends to relieve the hematoma reaction of the deep blood vessels during sexual tension.

Gently pinch the nipple between your fingers, use your entire palm to rub the breast, from light to heavy, the woman's happiness will gradually increase, breast erection is a natural thing, it is a normal physiological need, not a psychological distortion. Regardless of whether it is a man or a woman, the nipples are covered with nerves and are very sensitive. When stimulated by an outsider, they will contract, thus becoming hard.