Anecdatally, I’ve taken medication for insomnia before and ended up trying to stay awake for longer because I was enjoying the sensation of sleepiness. Unfortunately fighting to stay awake was kind of unpleasant, and negated the enjoyment.
>>> I suppose you can point out an analogous-seeming case with depressed people who lack the willpower to improve anything about their low mood.
This reminds me of the ‘Penfield mood organ’ in Philip K. Dick’s ‘Do Android’s Dream of Electric Sheep?’
>>> From the bedroom Iran’s voice came. “I can’t stand TV before breakfast.” “Dial 888,” Rick said as the set warmed. “The desire to watch TV, no matter what’s on it.” “I don’t feel like dialing anything at all now,” Iran said. “Then dial 3,” he said. “I can’t dial a setting that stimulates my cerebral cortex into wanting to dial! If I don’t want to dial, I don’t want to dial that most of all, because then I will want to dial, and wanting to dial is right now the most alien drive I can imagine; I just want to sit here on the bed and stare at the floor.”
(though this description is of someone who stays in a bad mood because they don’t have a desire to change it rather than lacking the willpower to)