Upon a unique experience, in a sauna, I noticed when the temperature is 60C and you fan yourself, the air is as hot as fire. Remembering a 1967 blizzard -30C and the strong wind, the air is cold like a sharp knife. When sitting in my hammock on a very hot summer day say 32C, a slight breeze makes a pleasant coolness pass over my body. If you go inland where the temperature on the same day is above 37C, which is normal body temperature, at 45C its again unpleasantly warm, just moving your head from side to side. We humans then experience cold and hot relative to less than 37C or more than 37C. What would a lizard have to say being cold blooded? Is there then, no logic but that which is, only relative to the experience?