The University of Montreal has found that men who had sex with more than 20 women lower their prostate cancer risk.
"Men who had slept with more than 20 women lowered their risk of developing cancer by almost one third, and were 19 per cent less likely to develop the most aggressive form.
In contrast, men who slept with 20 men doubled their risk of developing prostate cancer compared with men who have never had sex with another man.
Researchers at the University of Montreal believe that intercourse protects men, and men who are more promiscuous have more sex than those in monogamous relationships.
However, for homosexual men the benefit is lost because of the increased risk of picking up a sexually transmitted disease, and the damage to their bodies from intercourse. However gay men with just one partner are at no greater risk.
The study looked at more than 3,200 men over a four year period between 2005 and 2009.
Overall, men with prostate cancer were twice as likely to have a relative with cancer. However, the researchers were surprised to find that the number of sexual partners also affected the development of their cancer.
Men who said they had never had sexual intercourse were almost twice as likely to be diagnosed with prostate cancer as those who said they had.
When a man has slept with more than 20 women during his lifetime there was a 28 per cent reduction in the risk of having prostate cancer, and a 19 per cent reduction for aggressive types of cancer... "
Media link -
http://www.telegraph.co....cer-academics-find.html
Abstract -
http://www.cancerepidemi...%2814%2900155-6/abstract