The science of 'sexy' dancing

My brother sent me an article that gives "scientific" evidence about what dance moves women find most attractive. You can't read the article without chuckling. So what is "sexy?"

The pelvis gets surprisingly short shrift. Instead, the researchers say, the difference between a bad dancer and good dancer comes down to the neck, torso, and right knee. Women tend to be drawn to men who move their upper bodies, use a lot of space, and vary their movements.

For example:

Which makes me wonder what category this would fall under. According to the article and video, I think it's "good":