Mat dance
"Use the chain," I said. "It is on your neck, Use it! Use it in the mat dance."
"Dance?" she wept.
"Yes," I said, "you can consider it a dance. You can treat it as a dance. You are writhing for a master, pausing now and then to startle him with your beauty, on your chain. There is music here. Feel it in your belly. Deep in your belly! Deeper! Yes! Yes! "
Mercenaries of Gor pg 369/370