In men recent review found that men who had more frequent penile-vaginal intercourse (PVI) had less risk of developing prostate cancer. One study found that men who averaged having 4.6 to 7 ejaculations a week were 36 percent less likely to receive a prostate cancer diagnosis before the age of 70. This is in comparison to men who reported ejaculating 2.3 or fewer times a week on average.
For men, sex may even affect your mortality. One study that had a 10 year follow-up reported that men who had frequent orgasms (defined as two or more a week) had a 50 percent lower mortality risk than those who had sex less often. Although results are conflicting, the quality and health of your sperm may increase with increased sexual activity, as some research suggests.
In women having an orgasm increases blood flow and releases natural pain-relieving chemicals. Sexual activity in women can improve bladder control reduce incontinence relieve menstrual and premenstrual cramps improve fertility build stronger pelvic muscles help produce more vaginal lubrication potentially protect you against endometriosis, or the growing of tissue outside your uterus.