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Men could reduce their risk of developing prostate cancer through regular masturbation, researchers suggest.

They say cancer-causing chemicals could build up in the prostate if men do not ejaculate regularly.

And they say sexual intercourse may not have the same protective effect because of the possibility of contracting a sexually transmitted infection, which could increase men's cancer risk.

They found those who had ejaculated the most between the ages of 20 and 50 were the least likely to develop the cancer.

The protective effect was greatest while the men were in their 20s.

The researchers suggest that ejaculating may prevent carcinogens accumulating in the prostate gland.
Anthony Smith, deputy director of the Australian Research Centre in Sex, Health and Society at La Trobe University in Melbourne, said

"Masturbation is part of people's sexual repertoire.

"If these findings hold up, then it's perfectly reasonable that men should be encouraged to masturbate,"