Whether or not you can actually choke yourself to death has been gone over many times, and the general consensus is that you are unable to kill yourself this way. Fast forward to a galaxy far, far away. One of the powers we most commonly associate with the dark side of the force is the iconic "Force Choke," the ability to lift (not sure if Vader was special, but I can't remember another time I saw someone lifted off the ground) and strangle someone just by clenching your fist.
What if you, as a Sith, hated everything, especially yourself, and decided one day to end it? Granted there are much faster ways (quick one-two with the ol' lightsaber or maybe being tickled with spooky lightning) to end your life, but for some reason you're adamant on choking to death. I ask out of curiosity as Anakin released his grip on Padmé prematurely (if memory serves) which gave her enough time to name her children before popping her clogs. Whether she actually died from "losing the will to live" or not I'm unsure of.