Cheese vs cheese became popular as a shareable reaction format because the phrase alone sets up an absurd contest with no context needed. Online creators reuse it whenever two similar foods, characters or choices need to be framed as rivals, especially in short form edits and soundboard posts. The repetition makes it easy to remember and easy to drop into unrelated jokes, which helped it circulate as a flexible meme sound rather than a clip tied to one specific scene or moment.