Short reaction lines like this one thrive in short-form video because they can carry a whole joke in under three seconds. The phrase works as a playful claim of familiarity, so creators use it when a character, pet or stranger suddenly acts like family. Its brevity makes it easy to repeat, remix and place over edits without losing the punchline, and that flexibility has kept it in circulation for memes, skits and reaction videos where a quick, recognisable voice line does more than a longer explanation.