.●● female when nature excited,the breast meets the hyperemia swelling; After appears the sexual climax,hyperemia rapid retrogression,the breast replies the original condition. If the feminine sexual desire is suppressed for a long time,cannot achieve the sexual climax,the breast hyperemia abates very much slowly. The long time hyperemia could create the breast painfully swollen. Normal married female,in sex life,the breast receives the natural stimulation which should have,has the hyperemia swelling and the detumescent periodic variation; If low and lacks the sex life in the long-term sexual desire in the situation,lacks this kind of change,the breast easy to have the mammary gland to increase falls ill. This kind of disease occupies the mammary gland disease three members two,in which has the small number of people also to be able to become the mammary gland tumor. The modern medicine research already proved that,increases in the cause in the mammary gland which falls ill,low and the sex life was not harmonious including the function. Therefore,not only the harmonious sex life is helpful in maintains the husbands and wives to be harmonious,safeguards the husband and wife health an important attribute
.●● in nature reaction process,the both sides nipple erection not necessarily is at the same time. On the breast outward appearance,the different person breast shape is different,has the small dish shape,cone,hemispheroid,spindle shape and so on. The majority feminine both sides breast is symmetrical,but some people are also asymmetrical. Just like one side some people brazen,at the same time bashful,one side some people the corners of the mouth are high,the corners of the mouth are at the same time low; Some feminine both sides breast one side is slightly big,one side is slightly small,some person one side is slightly high,one side is slightly low. If both sides breast to estrogen mixed reaction type,gland proliferation active one side can big. Moreover,the chest greatly myo- developed degree also affects the breast outward appearance,habitually uses the right hand because human right chest greatly myo- developed,right flank the breast can appear big,on the contrary,habitually uses the left hand because human left chest greatly myo- developed,left side the breast can appear big.



