We have all had a limb “fall asleep” in a non-bondage context, and we all recovered, I imagine? That sensation is usually caused by a combination of reduced circulation and minor nerve injury. The two are inseparable to some extent – reduced circulation reduces circulation to everything, including the nerves, which causes them to go a bit haywire when circulation is restored.9Despite the fact that most of the time your body will recover when you experience these symptoms, the damage that can be done by bondage is a bit different than the type caused by crossing your legs for too long (it’s more focal compression, for one thing). Also, you can suffer from nerve damage just from crossing your legs for too long or too often.8 Thus, in a bondage context, I would never dismiss complaints of limb numbness as “just” being a “sleeping” limb.