This works for a lot of things.

There are a lot of things you can read from a woman's body language, and the psycho-kinetics of her movements, just like you can read a man.

After spending a few years of vacations with my ignorant, chronically ill, two-faced, gossiping, so-stupid-they-are-intellectually-retarded female in-laws, I can now tell just from how a woman moves, talks and presents herself, whether she's a narcissistic, airhead cunt who has no critical thinking skills, but will manipulate and twist everything to her games, to get what she wants.

You can also tell, from how a woman walks and talks to another woman, whether or not she will stab that woman in the back, given a chance.

All you have to do is get to know someone's mentality and phenotype well, and understand the root dysfunctions/causes of their body mechanics (kinesthesiology) and you can type them pretty accurately.

Of course, all such typing is just prediction and projection. So you can't act on your predictions when dealing with individuals, because that is prejudice. Making accurate predictions and acting on those predictions with individuals is the difference between analyzing and bigotry.