Understanding Testosterone To Understand Relationships

I have been reading about human brain chemistry and the difference between men and women. Before I begin with my short paragraph, how come they don’t teach stuff like this in high school.
Here is the summary;
  • Testosterone levels peak at around four months of conception – Nothing really useful here.
  • Brain and build are affected by testosterone –Less testosterone lead to better communication skills. More testosterone can resolve to better visual and spatial skills like parallel parking. That is why men are so bad at expressing their feelings and communicating and women are so bad at parallel parking. Women Mystery #1 … Solved !!
Reference: The 2d4d ratio experiment http://en.wikipedia.org/wiki/Digit_ratio