Why would anyone do that to themselves? Imagine yourself in this situation. You would probably be begging for a TV break and pissing and moaning about how you need to check your facebook in case you have some new notifications. Feeling real enlightened by that "which superhero are you" quiz yet?
In reality, asceticism is not about the pain caused by these deprivations, but the obstacles caused by indulgence that are in the way of ultimate spiritual freedom. It is the process of overcoming the material world.
I'm not going to say that this is true all the time, or for all things, but this is what I have concluded: