Kuchu puchuu has circulated online as a short, shareable affection sound rather than as a clip tied to one well-known film, show or creator, and its exact first upload is not widely documented. Its charm comes from the way the playful syllables mimic the baby talk people use with infants, pets and loved ones, which makes it instantly understandable even without context. On short-form video and meme pages it is reused for cute reactions, couple jokes and pet edits, keeping it popular because it adds warmth without needing words or a punchline.