Men on top and women on the bottom, women on top and men on the bottom, the difference is actually so big?

Between men and women in life, the man on top of the woman below, this posture is very normal. Because men and women's physiological structure is different, so in life between men and women, this posture is also very normal. But if men and women in life, men and women keep this position for a long time, then the body of men and women is a certain impact, because this posture, on the men and women's physical health, is a certain impact. So in ordinary life, men and women in life, must pay attention to this posture, do not keep this posture for a long time, so that can be conducive to the health of men and women's bodies.