Frustration is reading that hot, hot, hot porn story online, really getting into it, your half-awake mind being transplanted into this other world of debauchery and deviance. And then, when both in the story and in reality, climax is reached, you come awake to realize that because your frivolity, you will now be late to work.
Or, frustration is reading something that bothers you, admonishing yourself to just not read that again, lest it bothers you some more. And a mere minute later, catch yourself swinging your browser towards the same story, just to get upset again.
Even more, frustration is that book you've been reading for 2 weeks now on your commute and cigarette breaks. You have 40 pages to go to the finale, you want to devour these last words, but you know you have to close the book because people expect you to actually work for a living.
Reading is frustrating. Reading is fundamental.
Frustration is fundamental.