My bank statement is a work of fiction.

This joke tickles our funny bone through a delightful blend of irony and relatable absurdity. The setup, "My bank statement is a work of fiction," immediately sets up an expectation that something about the statement is wildly untrue or fabricated. We know bank statements are supposed to be objective records of our financial lives, so calling one "fiction" is a humorous exaggeration, a form of hyperbole that many can empathize with when looking at their own spending.

The punchline then grounds this exaggeration in a wonderfully specific and common experience: "There's no way I spent that much on tacos." This is where the absurdity kicks in. While the idea of a bank statement being fictional is a stretch, the notion of unknowingly spending an excessive amount on a beloved, seemingly inexpensive treat like tacos hits home for many. It plays on the universal shock of seeing how small, frequent purchases can add up to a surprisingly large sum, revealing spending habits we might prefer to keep fictional.

The humor lies in this clash between the cold, hard facts of finance and our often-unrealistic perception of our own spending, especially when it comes to delicious indulgences. It's a lighthearted jab at the sometimes-uncomfortable truths revealed by our financial records, reminding us that even the most factual documents can feel like a fantastical tale when our taco budget runs wild.