Gulliver describes the Yahoos as though they are animals which are completely distinct from him; he does not seem to realize their similarity -- in fact, he describes them as "singular, and deformed."  He describes the males as having "thick Hair" on their heads and chests with bare bodies of a "brown Buff Colour."  They have "no Tails, nor any Hair at all on their Buttocks, except about the Anus," and they stood on their "hind Feet."  The females are smaller with droopy "Dugs [that] hung between their fore Feet."  Of the race, Gulliver says, "I never beheld in all my Travels so disagreeable an Animal, or one against which I naturally conceived so strong an Antipathy."  Without knowing why, he finds them completely disgusting and reprehensible.  When they climb into the tree above where Gulliver is sitting, they "began to discharge their Excrements on [his] Head."  In short, they are foul and loathsome, and he is anxious to escape them.