Technique. This is a sacred word to skin therapists. To begin with, it's French-more on that in a moment. For generations, technique has been the skin care profession's raison d'etre-oops, I mean entire reason for being. Mastering the traditional posture, movements, and protocol defined the very essence of being a skin therapist, similar, let's say, to the discipline of a classical ballerina or a Cordon…