The women of the world have known at least part of the truth of this for years. What this really means is that the brain of that organ has greater control of the individual's nervous system than do the other brains. Even if you include the larger snot-producing portion of this organ, it is obvious to any engineer that there isn't enough room in it to store all the memories a person will collect over the years. It is true that in a few humans, usually very young humans, this brain is the body's lead brain. You can tell when this brain is the lead brain by the excess in snot production.
Different people have different lead brains.
In the example given above, the brain in the man's sex organ served as the body's lead brain. For another man, the brain in the stomach might serve as the lead brain. In women the most common lead brain is that of the tongue, which governs speech. In other women the brain of the heart takes this role, and they spend their days seeking impossible romance. The lead brain can change from time to time.