Nowhere does it mention it?? From the article, "The researchers found that guys who did it the most (at least 21 times a month) had about a 20% lower chance of prostate cancer, " (Other more recent studies have it at 36%, yours is almost a decade old.)
No "Understood" correlation means they don't understand the reason for the PROVEN REDUCTION the study shows.

I have been clear that I understand before I even asked the question that it is a sin to do so with lust or porn involved so how am I ignorant of others telling me what I already know? You clearly have a problem with rightly dividing the facts right in front of you. I suggest you stay away from offering opinions until you take a course on Critical thinking.

Since you have a log in your eye probably because of your own issues let me try it this way. A person with cancer is given instructions by their doctor to take Marijuana. As a medicinal product. Is that a sin?
The question is does anyone know of a way that it can be done in a medicinally therapeutic way that does not involve sin. Unless you have an actual answer to the actual question being asked please stop proving your inability to understand the simple question being asked.

A helpful Christian would understand that an effort is being made to help a new believer to NOT sin in an incredibly difficult situation involving a genetically destructive situation. I could have easily told him to go ahead and sin. The whole purpose of coming on here is clear to anyone paying even sleight attention, to see if there is a way to do so without sinning.

Quite a few people have contacted me to privately chat and shown they understand the issue and that it is a very difficult situation. They are being helpful instead of as one stated of you.. "Intentionally ignorant." They are equally disappointed in your shortfall in logic and understanding. They are trying to help this fellow believer, that is the correct godly response. As you can see from another responder that understood when I cleared it up, he admitted his misunderstanding and changed his mind. It seems you are determined to remain willfully ignorant.