That was me and I agree with your corollary.
The difference between dominant and abuser, in my opinion, is self-respect and self-awareness. The dominant knows what he is and what he wants, but his self-respect will not allow him to take and abuse, so it must be given willingly.
Self-control, as well -- the abuser responds to disobedience by losing control, while the dominant becomes more in control of himself to respond with firmness and discipline.