Richard, Promise you won't laugh at this, but I swear it works. I've had leg cramps off and on for years (yes, especially during sex!) and have a quick technique for relief that doesn't make you miss a beat, so to speak. Just bite your lower lip hard and pinch your upper lip with your fingers. In a minute, the cramp is gone. The scientific explanation is that this is a trigger point for those muscles, but I think it's just that your lip hurts so much you forget about your leg. Try it next time and see if it works for you. Pat