Final answer:
In Gulliver's Travels, the Houyhnhnms discover that Gulliver's physical appearance is different from their own and find him fascinating.
Step-by-step explanation:
In the novel Gulliver's Travels, the Houyhnhnms are a race of intelligent, rational horses who discover that Gulliver's physical appearance is quite different from their own. They perceive him as a strange, grotesque being, due to his smaller stature, lack of a tail, and his ability to talk and use his hands. The Houyhnhnms find Gulliver's appearance fascinating and view him as a curiosity.