When it comes to power as it functions between humans, it all comes down to desire. If you know what someone wants, you can control them. It is as simple as that. And the reverse is also true: If you have control over your own desires, no one will ever own you. As humans, we are plagued with desire - it consumes us, it fuels us, it destroys us.
My dad was very, very invested in image. He felt that as a black person, the thing you could control was how did you look, how did you dress, how did you sound, how did you smell, how did you act. All of that stuff that you could control would absolutely have a strong impact on your access.