The title phrase, said with just the right intonation, could be dismissive: a polite, thinly veiled way of saying “I am not really interested.” But my concern here is with the sincere variant of the expression—particularly in science, when it is said to oneself, sotto voce. For this statement is how curiosity is stirred. And, as I will argue in a continuation of a small campaign to value the “unmathematicizable” in science (I’ve also written about the importance of metaphor and storytelling), psychological interest is a progenitor of scientific creation itself.