sexuality.about.com/od/sexua...ealth.htm

A UK study which looked at the relationship between having frequent orgasms (two or more per week) and mortality in men. At a ten year follow up the researcher found that men who had frequent orgasms had a significantly lower risk of death than men who did not have frequent orgasms.

* Several studies have hypothesized that hormones released during arousal and orgasm, specifically oxytocin and DHEA, may also have protective effects against cancer and heart disease.

* Research has also pointed to the sedative and relaxing effect of oxytocin and other endorphins released during orgasm, which may explain why people use masturbation as a way to get to sleep, and why sex is a great way to deal with stress.

* There have been two studies which have found a connection between men who ejaculate regularly and a reduced incidence of prostate cancer.