The phrase comes from a Portuguese-language voice recording credited to Sidmar Borges under the title Isso é tão romanticooo, with the elongated spelling matching the drawn-out delivery. It circulated as a shareable soundboard clip rather than as part of a film or song, and its appeal rests on a universally understood swooning tone. Portuguese-speaking creators helped spread it as a quick romantic reaction, similar in use to a Sexy Sax cue but delivered as speech. It remains popular because it can sound sincere, cheesy, or sarcastic depending on context.