New study links ejaculation frequencies to rates of prostate cancer; but the jury's still out

The Jury's Still Out U.S. Army

The hairy palms don’t sound so bad, and the blindness seems manageable. But cancer! It’s bad news for both Don Juans and subscribers to Swank Magazine, as a new paper in the British Journal of Urology International (BJU) reports a statistically significant correlation between the frequency of sex and masturbation to the early onset of prostate cancer.

But doctors disagree over the link between sexual activity and prostate cancer. While a 2002 paper in the journal Epidemiology backs the BJU study, a 2004 study in the Journal of the American Medical Association (JAMA) and a 2003 paper from the Australian Cancer Council Victoria claim that frequent masturbation and intercourse actually decreases the risk of prostate cancer.

The BJU study, conducted by a team from the University of Nottingham in England, looked at one group of 431 men who had been diagnosed with prostate cancer before the age of 60, and 409 men who did not have the disease. Of the 431 men with cancer, 40 percent of the men reported masturbating or engaging in sexual activity more than 20 times a month during their 20’s. Additionally, the cancer group also had a larger percentage of men who reported having more than six female partners in their life. And the men in the cancer group were also more likely to report having once had a sexually transmitted disease.

However, in the JAMA paper from five years ago, men who reported ejaculating more than 20 times a month showed a 33 percent lower lifetime risk for prostate cancer than men who reported only ejaculating between four and seven times a month. In contrast to the BJU study, which only looked at heterosexual sex and masturbation in 840 men, the JAMA study looked at all ejaculation for 29,342 men.

Similarly, the Australian study compared 1,079 prostate cancer patients and 1,259 healthy men, and found that the men who ejaculated at least once a day during their 20’s were a third less likely to develop prostate cancer.

With evidence on both sides of the debate, doctors seem to be hedging their bets. Michael Leitzmann, a doctor at the National Cancer Institute and the lead author of the JAMA study told Reuters that he didn’t believe his study should lead to men altering their sexual behavior, a position reiterated by the Mayo Clinic.

Since the jury’s still out on the effects of ejaculation on cancer risk, it might be premature to either hoard Viagra or to cancel the Playboy subscription. Of course, all you reading this online should still probably get at least your eyesight checked out. After all, we know what you really use the Internet for.

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12 Comments

DarkFx

from Winnipeg, Manitoba

So what happens to your load when you don't get off? Does it Rot inside you? Your mind and body clearly says its great for you. Gotta keep on the update. Cancer can simply develop from unhealthy, or too healthy; or abnormal living conditions by putting synthetic compounds into the human body and expecting the best.

If the jury is indeed out, as the article so helpfully points out, then why couldn't PopSci have waited until it was in? Now all we have is an article that tells us that ejaculation could be both very bad and very good for us, and not much more. I think waiting until a better scientific consensus could have be reached would have been less confusing to the public. I'm sure the writer and the editors enjoyed chuckling over all the jokes about an intensely private matter. I think sometimes the magazine focuses the "pop" part of its title a bit much. Just stick to cold fusion, personal hovercars and hypersonic airliners.

Hey, "PopSci" was never more appropriate.

That picture, though... Unless "Swank" magazine has perfected holographic porn, this article is a definite candidate for the worst case of visual hyperbole...

I'm actually more curious how and why a copyrighted US military photo, first hosted on www.us.army.mil in late august 2008, is being used in this way.

Taken in the early hours at YAKIMA TRAINING CENTER, WASHINGTON STATE, 2-146 FIELD ARTILLERY TRAINING

You take notice, when its something fantastic you have a connection with...

I'm actually more curious how and why a copyrighted US military photo, first hosted on www.us.army.mil in late august 2008, is being used in this way.

Taken in the early hours at YAKIMA TRAINING CENTER, WASHINGTON STATE, 2-146 FIELD ARTILLERY TRAINING

You take notice, when its something fantastic you have a connection with...

dumbest article i've read so far on this site. congrats, you've outdone yourselves with this really stupid article. now let me go have a nice wank

That picture is hilarious!

I am more interested in the correlation between the sexually transmitted disease and prostate cancer. We know that a cervical cancer is primarily caused by a sexually transmitted disease, could they same hold true for prostate cancer?

2 large scale studies of the general population show that those people who frequently ejaculate are approximately 33% less likely to get prostate cancer. Two small scale studies focused on a non-general population cancer-having group and a control group show that the cancer group had more sexual activity. The answer is clear to me. They did not control for risk aversion in the small scale studies. It's likely the group having cancer engaged in high risk activities more often such as unprotected sex, smoking, unhealthy diets, etc. that lead to them being more likely to contract cancer. If you are a person that likes to take risks and does not think about consequences, you are both more likely to contract some form of cancer and to be more promiscous. They need to control for high risk behavior, check for STD rates, and answer the Chicken & Egg question. Perhaps it's not that the frequent sexual behavior lead to cancer, but that a preexisting condition that makes them more likely to contract cancer caused increased libido or decreased inhibition/risk aversion. Correlative is not necessarily causal.

Clearly, I think that this topic could have been put on hold until a clear answer could have been decided on.

This is a clear case of: Ha! Caught you looking!

To masturbating, or not to masturbating: that is the question

:)



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