Why do women's nipples get hard during sex?

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　　Gently clamp the nipple between your fingers, wrap the entire palm of your hand around the breast and rub it, from light to heavy, the woman's pleasure will gradually increase, and breast erection is a natural thing.

　　Breasts are an important symbol of female sexual maturity and one of the most important sexual sensitive areas of women. They also play an important role in sexual life, but people often ignore this. During the excitement period of the sexual response cycle, the breasts will respond to sexual stimulation and the nipples will become erect. This is because the rich smooth muscle fibers in the nipples contract involuntarily after being sexually stimulated.

　　Under sufficient stimulation, the actual volume of the breast will increase significantly, which is the result of the hyperemia response of the deep veins of the breast. When a woman in a sexually responsive state has an erectile response, the congestion at the lower part of the hanging breasts is easier to observe. If the woman is in the supine position, the overall increase in breast volume will be more obvious. Obvious areolar congestion can be seen in the late stages of excitement.

　　Before a woman experiences the final orgasmic impulse, the erect size of the breasts of women who have not breastfed can increase by 1/5-1/4 than usual. The breasts of women who have breastfed have erections, but no significant increase in volume is seen.

　　This difference may be due to increased venous shunting during milk production in the fed breast. baby Sucking increases venous shunting and tends to slow down the hyperemic response of deep blood vessels during sexual tension.

　　The increase in breast size under the influence of sexual tension is not only related to the physiological response of blood vessel congestion, but also related to the fullness of the supporting fibrous tissue components that make up the breast lobules. Overexpansion of the breasts, which is common in early lactation, impairs the effectiveness of these supporting fibrous tissues. Therefore, it is understandable that the female breasts after breastfeeding are difficult to respond to sexual stimulation as they should.

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