Determine Gender?

Question

It is a simple question. Disregarding herring of the red variety, most responses rely on obvious features. But one doesn't need the obvious to make the decision we make immediately every day. Of course sometimes we get it wrong, but 99% of the time, what tells us ?

Answer 1

At first glance this looked like a question that I could answer,but upon further perusal I realize that this query is outside my expertise.

Answer 2

God and society.

Answer 3

intuition.