Over the eons, Rhinos have tried to figure out some way to recognize and categorize the infinite variety of olfactory stimulants that bombard Us, 24/7.
So far, our efforts have been in vain. We start sniffing, and We are overcome with the fragrances cascading over our receptors. Why sort them out when We can just surf on the thrill of them?
Otherwise, Rhinos would have some alphabet of quirks to apply to sensation, distinctions that could never be catalogued. And for what or why?