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What scientists have found, is that when a woman has vaginal sex with a man; and the man ejaculates inside of her, that the semen, if it is not washed out immediately, gets absorbed by the lining of the vagina and makes its way into the bloodstream. Once the semen has been absorbed, it has been found that it not only aids in relieving anxiety and depression in women, but also cuts down on the pain, discomfort, and cramps that occur with the pre-menstrual cycle.

It's found that, after a long period of time of semen introduced into the vagina during sex, that the woman will get used to the positive affects of the semen. If the semen is suddenly stopped from being deposited in the vagina, then the woman will have a return of associated menstrual discomfort and increased anxiety and depression. She will then have "semen withdrawls" and become more angry, hypersensitive, and irritable