Fascinating thread, Pat.
I am more or less ambidextrous, able to do most things with my left hand nearly as well as my right with the exception of handwriting.
Some research gives support to the hormonal wash theory; I've never thought that is the whole story.
Does the book make any mention of body shape at puberty? Mine was more like that of a cis-female without breast development than a cis-male. It would be interesting to see how my brain stacks up wrt male/female characteristics.
For those who want to read the book without buying it, the best bet is a university or college library that supports a significant Department of Psychology. I still have and use borrowing privileges where I obtained my B.Math.
