It is impossible not to enjoy a good fisherman’s tale, even if we do not believe a word of it. But here, the adventures, exaggerations, and even absurdities provoke laughter rather than aversion. Why? It is interesting to note that there is this type of lie that entertains, stimulates, and generates a positive feeling in the listener. And it opens the door to an entire literary genre in which creativity is free to manifest itself. The more ingenious and implausible the story, the more easily it is sometimes engraved in the memory, and the more it increases the merit of its author. Perhaps the mystery of this phenomenon is not a mystery at all: in it, the lie only works because it is based on purity of intention.