They live with Michelle Knee, Software Test Pilot, who writes this story:
When Calvin and Hobbes went in for their snip-snip surgery, the vet had them separated after surgery. As they woke up, they started calling to each other… constantly. The vet contacted me to let me know they had to put them in the same cage while they recovered because the vet couldn’t take hearing them worry over each other. As soon as they were put in the same cage, they curled up together and took a nap. A scary place is easier to deal with when your brother is next to you.
What Very Good Kitties — and friends — they are!