I thought this was pretty obvious. There is no normal body temperature just like there's no normal blood pressure, vision, etc. The "norm" here is defined by th

I thought this was pretty obvious. There is no normal body temperature just like there's no normal blood pressure, vision, etc. The "norm" here is defined by the statistical definition, the most prominent of the curve of values. If you want to be more abstract, the "normal" body temperature for an individual is that which brings their bodily functions into homeostasis. It can change moment to moment, let alone individual to individual.