I read some weird fanfiction a friend dared me to read (which I now regret) it involved a man holding his girlfriend in his lap with her back to his chest. the man was on cocaine which allowed him to stay awake for much longer than normal. The man started flexing his pecs up against her back constantly, changing up the pattern so her brain couldn’t get used to it. she did something bad, so he was doing it to kill her via sleep deprivation. he kept this up for over a week and she ended up dying of sleep deprivation.

If that happened irl, would it be possible? This article seems to suggest it’s possible to voluntarily stay awake until you die but it’s from the Dailymail so who knows if it’s even a true story xD