American psychologists say women who are sexually active and don't have a contraceptive partner are less likely to suffer from depression. Happiness research shows that couples who are satisfied with their sex lives have happier families. Sexual satisfaction also makes them more active and more developed at home and at work. In addition, semen not only contains zinc, calcium, protein and other...

Research shows that people who have a good sex life live longer than those who are single or divorced. During sexual intercourse, the body secretes youthful hormones to stimulate sexual arousal. It helps balance the immune system, improve digestion, promote bone growth, maintain tissue recovery and prevent aging. Whether you're a sexy big-breasted most realistic sex doll or a small-breasted...