Key points from article :
Men who ejaculate more than 20 times a month less likely to report prostate cancer than those ejaculating less than 8 times per month.
26% reduction in risk of prostate cancer for men aged over 50.
Study does not prove cause - only that it is associated with a reduction in risk.
May help reduce stress or keep cell metabolism well regulated.
Cohort study following up male health professionals from 1992 for 18 years.
The study was published in the European Urology journal.
