Sextus Empiricus Pyrrhoniae Hypotyposes 1.14.51

[51] Smell also will differ because of the variety in animals. For if we ourselves are affected in one way when we have a cold and our internal phlegm is excessive, and in another way when the parts about our head are filled with an excess of blood, feeling an aversion to smells which seem sweet to everyone else and regarding them as noxious, it is reasonable to suppose that animals too—since some are flaccid by nature and rich in phlegm, others rich in blood, others marked by a predominant excess of yellow or of black gall— are in each case impressed in different ways by the objects of smell.