There are two reasons for girls in sex:
1. Because the oxygen content in the blood will decrease when it is close or reached. At this time, women will fall into a mild hypoxia state, showing a series of so called "sexual orgasm symptoms" such as loss of eyes and mild spasm in the body. The oxygen content in the blood decreases, and the carbon dioxide will be relatively increased, so breathing will accelerate. Accelerating the disorders of breathing frequency, it will naturally make a unique call when orgasm.
2. When the climax is near, there will be a sense of joy. This kind of happiness will cause girls with a "excitement". For this "excitement", it will dilute the rationality of girls and make a call to even control. Some girls had no sound about whether they had sounded themselves, and they knew nothing afterwards. It can be seen that the call of sex during sex is completely a spontaneous physiological phenomenon, which is normal.
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