Well of course it sounds ridiculous when you use an absurd analogy. A more reasonable analogy was something like muscle fatigue, or even mental fatigue, and it

Well of course it sounds ridiculous when you use an absurd analogy. A more reasonable analogy was something like muscle fatigue, or even mental fatigue, and it seems reasonable to believe that willpower can be depleted in a similar way. In fact, there were many published studies consistent with this hypothesis (as the abstract states).