I found your article intriguing, and it is much in keeping with research on reevaluating our affections in a new light (that what seems cognitively certain is often affectively based). Need for knowledge (NfK) is something most of us can greatly identify with - and sometimes it is much like any hunger mechanism - thank you for suggesting this. May I ask, do you feel that curiosity could also be a more basal affectation?
You connect curiosity with cognition and conscious sense, but perhaps might it also be realizable at a more nonconscious level - since many animals exhibit curiosity and have no higher cognition per se (or language capability to discern knowledge proper). Curiosity seems to "overcome fear" and this seems to be a key component of it. That is, what is most curious (even in early and prehistory apparently) is usually most dangerous too, but somehow irresistible (e.g. Pandora's Box, Garden of Eden, and attribution to cats). It seems a "fear/desire" contention - perhaps we might even borrow your phrase with the slight change "fear-to-know"? An enduring story is that of the Tree of Knowledge, and certainly curiosity made it irresistible (and the affective relation collectively intuitive). If so, mightn't we also view curiosity as pre-cognitive?
Conference Paper Curiosity and Pleasure