The report is based on a survey of around 3,200 men. Half of the group had suffered from prostate cancer between 2005 and 2009. The team of epidermiologist Marie-Élise Parent first found out that heterosexual men who had sex with over 20 women in their lifetimes are 28% less likely to develop the cancer compared to straight men who don't have sex with as many partners. They think that a regular release of ejaculate could aid in the prevention of prostate cancer.
Gay men who bottom, however, are facing higher risks.
Gay guys who bottomed for over 20 male partners more than doubled their risk for prostate cancer. The risk of developing a more aggressive form of the cancer is also increased by 500%.
The research is not exactly clear on the mechanics of these findings, but they speculate that constant bottoming traumatizes the prostate. This results to the release of a prostate-specific antigen, a chemical that points to cancer in the area.
If this is true, then bottoms need to be more careful and should have their prostates checked once in a while. I wonder, however, if the research is based on the number of different partners (as it implies), or the frequency of engaging in sex (even if it's just with one or two partners)? Also, if ejaculating regularly aids in prostate cancer prevention, then would that somehow cancel off the negative effects of bottoming?
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