The amazing mosaic: The Brain
Believe it or not, the brain is very (very) complex: no longer does it appear that there are male and female brains; indeed, the latest conversation has failed to identify a clear dichotomy. In fact, each individual has a mosaic of traits classically considered male or female, such that everybody has a bit of both. Our psychologies are indeed blended and varied along the bell curves of gender.
Aeon Magazine just published an op-ed piece. It’s best citation comes from the Proceedings of National Academy of Science, 2015: