动物性活动唯一的目的是生殖，而人类性活动，尽管对维系人类自身繁衍是必需的，但同时也是非生殖的活动。这种性与生殖的分离在老年男子身上更易得到证实。大多数50岁以上男子已经生儿育女，但他们仍维持着积极活跃的性活动。显然，人类性活动对促进夫妻情感、稳定家庭起着非 The only purpose of animal sexual activity is reproduction, and human sexual activity, though necessary for the maintenance of human reproduction, is also a non-reproductive activity. This sexual and reproductive separation is more easily confirmed in older men. Most men over the age of 50 have children, but they still maintain active and active sexual activities. Obviously, human sexual activities play an important role in promoting couples’ feelings and stabilizing families