Up in Québec city, Peanut and I visited this exposition about the human body (which is something you think you've figured out after a few advanced biology classes, but well, you haven't) and there was this thing that allowed you to measure the temperature of your skin : you put your hand there, noted the number, you rubbed your hands together and then took the temperature again. (and wow ! it had increased by a degree or two)

I'm always cold. Peanut's always warm.
We didn't think of it before checking the temperature of our hands, and we were shocked to see my hands were 24 degrees, while his were 35 !