“So God created mankind in his own image, in the image of God he created them; male and female he created them.” – Genesis 1:27 (NIV) It begins at conception, when males and females start their developmental journeys down two very different paths. That juncture will affect the way they think, feel, and act for the rest of their lives. The brains of both sexes appear to be “female” until about the eighth week when a male brain is washed by a huge surge of testosterone. It is then transformed radically and even takes on a different color. This male sex hormone kills some of the communication cells, including a portion of the bundle of nerves called the corpus callosum. It is a rope of fibers that connects the right hemisphere, where emotion is processed, with the left, where language is focused. Although the corpus callosum survives the testosterone bath, the male brain will never be able to “cross talk” as effectively thereafter, which has major implications for future masculine behavior. Testosterone also causes an increase in the volume of neurons and circuits located in the boy’s sex and aggression centers. Because the female brain is not subjected to a ...