Her Cable-Flossed Pussy
Making a bound woman walk a tight pussy-rope (usually with knots to enhance her sensations) is a venerable bondage trope and BDSM practice. But this setup from the imagination of a Kitan Club artist seems intended (depending on cable texture and overall tension in the system) to be more about painful friction and pressure, more in the vein of tightly-cinched crotch ropes, only it moves:
Elsewhere on Bondage Blog:
Been there, done that, makes my crotch tingle in anticipation just thinking about it.