Months later, stress can trigger an old pet name, an ex's peculiar “so annoying,” and a calm capybara-like face. The person is obviously not a capybara; it is a visual metaphor, smile included.
A cue can reload a package
Remembering an ex is not identical to wanting them back. The bundle may be annoyance → phrase → voice → face → smile → familiarity → comfort. Repeated everyday safety—being able to complain, hearing the same voice, seeing the same face—can become associated.
Psychology and the joke
Associative memory, priming and autobiographical memory support the modest idea that linked experiences can later cue one another. They do not diagnose one breakup, and there is no “capybara-face ex syndrome.”
Conclusion
Relationship: uninstalled. Capybara-like face: cached. Catchphrase: still running. The uninstaller missed a file.

