Perhaps that's your topic for the evening... tell him how much you crave for him to get back home and tie you up... and how you love his hot ruff and tumbles... verbally relive a past experience that got you both extremely hot...

Not that I know a lot on this topic, but I heard that expressive moans are helpful to the person on the other end of the phone.

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When you get to the end of your rope, tie a knot and swing.