As a curly and wavy haired man, I have noticed some behaviour differences in curly haired people compared to straight haired people.
Feisty and strong willed is often associated with curly haired people
Asians are typically obedient and group thought driven, though nose shape and other factors combine with their typically dead straight hair.
African hair is very tightly curled and I imagine certain behaviors are a product of this hair type. As I really dont know any african people here in NZ [the woman in the chemist shop is the only african descent person I know] , its hard for me to know the african way.
The science is that when you coil an electrical wire you create a stronger magnetic field around that wire. All electrical motors and many devices like solenoids require coiled wires.
So tightly coiled hair has some kind of amplified effect on the mind that neither lightly curled or straight hair does not.
I was watching video of Himba people from Namibia, and they got some out of this world hair styles,, like alien spacecraft weirdness hair styles going on.
To me, this says that beyond dreads, are hair styles that may open doors of consciousness not normally appreciated in western culture...
google image Himba hairstyles, these people are very attractive