There is research that links frequent ejaculation with a decrease in prostrate cancer. They found that men between the ages of 20-50 who frequently ejaculated were less likely to develop prostrate cancer. The strongest effect was found in men in the mid to late 20's, who ejaculated 7 or more times a week. They were 1/3 less likely to develop prostrate cancer. They think that frequent ejaculations prevent carcinogens from building up in the prostrate by flushing them out.
http://www.cancervic.org.au/media/m...prostate_cancer_risk_and_sexual_activity.html
http://www.cancervic.org.au/media/m...prostate_cancer_risk_and_sexual_activity.html