This is awesome as usual. Where I come from, we take whatever we perceive as what biology had offered and we make it a rule. There are no exceptions but I have always known that black and white are hardly existent in nature and whenever we think we have seen either of those, we must look again and even then, we must make allowances that we have not seen correctly. Your sex difference series had been educative and has confirmed some of my deep thoughts on gender and sexuality. As usual, I have learned a few things on writing style. So thank you.