My girlfriend love to be used almost like this only difference is we use one more clamp with weight to clitoris and double penetration sex machine with 2 electro shock dildos on max speed on both penetration and max on Electro shocks while i gives her hard caning on her butt. She loves the pain form clamps the Speed from the sex machine electro shocks and from caning mixed together while she is gagged with her pantyliner she weared at gym yesterday kept so it is still soaking wet of sweat and ballgag. We use hand signal when its time to stop.