The exact source of this CBT meme sound is not clearly established from the available information, but the clip is widely used online as an ironic shock joke. In meme culture, CBT is commonly read as a deliberately uncomfortable phrase, and that contrast is what made the audio spread in short edits and reposts. It remains popular because it is instantly recognizable to people who know the joke, and it can flip a normal scene into something crude, awkward, or absurd in a single beat.