The Kanamit were not very pretty, it's true. They looked something like pigs and something like people, and that is not an attractive combination. Seeing them for the first time shocked you; that was their handicap. When a thing with the countenance of a fiend comes from the stars and offers a gift, you are disinclined to accept.
I don't know what we expected interstellar visitors to look like - those who thought about it at all, that is. Angels, perhaps, or something too alien to be really awful. Maybe that's why we were all so horrified and repelled when they landed in their great ships and we saw what they really were like.
The Kanamit were short and very hairy - thick, bristly brown-gray hair all over their abominably plump bodies. Their noses were snoutlike and the eyes small, and they had thick hands of three fingers each.
They wore green leather harness and green shorts, but I think the shorts were a concession to our notions of public decency. The garments were quite modishly cut, with slash pockets and half-belts in the back. The Kanamit had a sense of humor, anyhow; their clothes proved it.