Oh, submitted too quickly. I have also been wondering if there are differences among our population in the way our whole bodies are wired? It is a theory I am playing with, and I may never know the answer. For example, my teeth do not freeze very well at the dentist. If a tooth at the back is supposed to freeze, for example, it will not freeze at all and my front lip freezes. I have an excellent, experienced dentist. I have a nerve in a place where is doesn't belong and I have a nerve in a place where it should not be. I have some synesthesia and certain words have textures. I wonder if it has anything to do with the way peripheral nerves are mapped and bring information back to the brain. I don't know if I am making sense. It is just one of those thoughts that I entertain. Just curious.