I guess the person who is on top and moving is the leader. Except for tying her victim down, I think the lady has the most control and power when she kneels over him and sits on his mouth.

Being trapped under a lady with your head between her thighs and your face half covered, really puts you in your place. Especially because she can look you in the eye and give you as much or as little of her pussy as SHE wants. Shiver...!