Dr. Jeff Says
Dr. Jeff Says
Man is a life form, an animal, a mammal. Biology is basic. It is a phrase we will frequently repeat. The most basic motivation of any species—plant or animal, grass or gnats, gnus or humans—is to pass on its DNA and ensure the continuation of its specie. At a genetic level life wants to keep living. For humans, underlying everything else is this one drive. It is the foundation of every thought, every action, every behavior. It includes not just voluntary behaviors and conscious and subconscious thoughts, but physical growth and all involuntary chemical actions. It even includes death, as death is a part of the life cycle and rejuvenation of the species.
At the biological level the individual is subordinate to the species. What are the implications of that statement?! Might we project that this is the root of selfless behavior, charity, and/or valor?
In the human species the biological roles of the male and female are different. These roles are built into our bodies and into our brains. Rick’s brain is hard-wired differently than Ilsa’s. This creates and accommodates his gender-specific functionality. Basic biology does not limit or restrict these differences to acts of procreation but displays them in virtually all behavior. It starts in utero.
From conception to approximately eight weeks all human fetuses are functionally female, and functionally identical. As embryos develop, those with Y chromosomes call forth testosterone. This hormone continuously circulates throughout the developing body, bathing every cell. Those cells with androgen receptors absorb the chemical messengers, incorporate their data or act upon their commands, then manifest specific male characteristics. If there were no testosterone, or no androgen receptors, we would all be female. One might claim man was made from the rib of a woman! *(1)
In conjunction with testosterone (T), Müllerian Inhibiting Substance (MIS) forces anatomical changes: T turns on the blueprints for building maleness; MIS deconstructs and destroys the vestiges of femaleness. Female anatomy transforms into male anatomy. The clitoris becomes the penis; the vulva, the two labia, become the scrotum; and the ovaries that remain in the abdomen of the female descend through the inguinal canal and drop into the scrotum becoming the testes.
The anatomical alteration coincides with brain transformations which lead to male personality traits. These traits, within the complimentary gender binary, optimize the most basic motivations of every species—as stated, to ensure species continuation. So how does the male brain differ from that of the female brain?
Read more in Part I, Biology is Basic, in Dr. Jeff's The Life of Men.