[NOTE: "Secondary bodies" refers to men]

All secondary bodies were once perfect women, at least in the first two months as a fetus, it was no different from a female fetus. And the 6th week is the turning point of its fate, the SRY gene on the Y chromosome begins to be transcribed, producing SRY protein to turn the primordial gonads that should have developed into ovaries into testes. Starting from the 8th week, when it only weighs 2 grams, the Y chromosome gene releases up to a hundredfold of testosterone through the testes, beginning a comprehensive downgrading process (masculinization) on its brain.

Irreversible Fetal Brain Masculinization Degradation

1. Pruning of neural networks in the empathy language awareness region Fundamentally limits the capacity to construct advanced conscious communication

2. Highly lateralized brain Left and right hemispheres tend toward independent operation, lacking a holistic view, adept at linear logical thinking, modular science-oriented brain

3. Approximately 2.5 times larger sex drive region Sex drive becomes its core motivator

4. Specialized amygdala and weakened prefrontal cortex Instinctual fight-or-flight reactions, high stress, difficult emotional control

(Translated)