All a female needs is to feel the collar on her neck. Here's one from a reformed FRA agent Cuntry Road Inc acquired and is training. Note the reaction changes from when my trainer puts on her collar for her. She knows it's her place.
Trussed upside down and forced to cum. I love the chin strap on the ball gag that wraps around her neck to make sure that she can't push it out. (sound in comments)
The power he feels when his fingers are round her neck being equal to how powerless she feels as the light fades from her eyes, thrills both like nothing on earth
