壮年期的男性和女性由于结婚,找到了安定的性行为的对象,因此人们认为这一下可以达到预想的、过充实性生活的目的了。但非常遗憾的是,事实上并不是那么回事。因为男性的性欲一般在15岁为顶峰,其后急速减少;而女性的性欲则不是如此,她们从20岁到50岁几乎保持平衡的状态。 Because males and females of maternity have been able to find a stable sexual partner for their marriage, it is assumed that this will achieve the intended and over-fulfilling purpose of life. But it is very regrettable that in fact it is not the case. Because men’s sexual appetite peaked at age 15 and dropped sharply thereafter, women’s libido did not, and they nearly remained in their 20s to 50s.