Heat is to energy as feces to food. It's not quite valueless by mass or by volume, but close enough that for most purposes the major issue is rejection.
Nice analogy, in hindsight only it’s in the name: waste heat. It takes the tiniest bit of impolite thoughts to make that lovely connection, thanks for that morning coffee bit of trivia.
Well, it's the human condition, once a day more or less whenever healthy. That's not only unpleasant, though! Also part of that condition is being a member of a species with the wit to invent soap.
