In this article about how the "sexual pursuit area [in the male brain] is 2.5 times larger than the one in the female brain," the most astounding claim is made:

Our brains are mostly alike. We are the same species, after all. But the differences can sometimes make it seem like we are worlds apart.

The "defend your turf" area — dorsal premammillary nucleus — is larger in the male brain and contains special circuits to detect territorial challenges by other males. And his amygdala, the alarm system for threats, fear and danger is also larger in men. These brain differences make men more alert than women to potential turf threats.

Meanwhile, the "I feel what you feel" part of the brain — mirror-neuron system — is larger and more active in the female brain. So women can naturally get in sync with others' emotions by reading facial expressions, interpreting tone of voice and other nonverbal emotional cues.

If this claim is indeed true, if females have a larger and more active mirror-neuron system than men, then men are clearly the inferior sex. Why? Because what makes us human (the way we manage our affairs, prepare food, communicate, raise our young) is our sociality (our state of being social). Every other aspect of our species is not as remarkable or essential than our ability to form and stabilize strong social bonds. So, if our socialiality most defines who we are as a species, and an important biological component of our socialization is the mirror-neuron system, then to possess less of them is to be (by definition) less human. Men are less human than women. (How did I get myself into this corner?)