Rule 4: Rule 34
The Rule: If something exists, there IS porn of it. How This Rule Would Improve Fight Club: Come now, I may believe Edward Norton shooting himself in the cheek will miraculously shoot the mentally projected Tyler Durden in the back of the head, defeating mental illness with bullets rather than strength of will or some other pamphletted clichés, but I refuse to believe a group of men would spend this amount of time together and their sole focus would be soap explosive production. Hence Rule 34's inclusion: this would add a sense of realism as the men spent their conversations chucking out innuendos or finding pornographic versions of soap production€ It is Rule 34.