Calvin and Hobbes by Bill Watterson for July 14, 1992
Calvin: Bugs fly in such crazy loops and zigzags. I wonder why they don't get dizzy and barf. Hobbes: Maybe they do! Calvin: Eww, gross! Ha ha ha! but then why would they keep flying that way? Hobbes: Maybe bugs like to barf! Calvin: Ewwww! They would!! Ha ha ha ha! Blaugh! I tell you, Hobbes, it's great to have a friend who appreciates an earnest discussion of ideas.