Don Foreman writes:

I've always thought of temperature as proportional to heat content in
joules or calories times specific heat of the material holding it.

If that were always true, you couldn't have air conditioning, or an ice
cold drink.

Stretch a fat rubber band. What happens to the temperature of the middle
of it (use your perioral sensor)? Let it equilibrate to the ambient air
for a moment, and then relax it, and then what happens to the temperature?
Temperature and heat content are not always related.