Songfacts®:

• The "tongue" in this song is an intrusive inner voice: a critic that gets inside your head and chips away at your confidence. The repeated line, "Deep inside your brain, I feel the same," reinforces that sense of a psychological shadow you can't quite run away from.
• Fontaines D.C. frontman Grian Chatten revealed in August 2024 that he had been diagnosed with ADHD earlier that year, giving the lyrics a personal dimension. The track captures the exhausting internal loop of overthinking, self-reproach, and mental chatter, a theme that echoes earlier Fontaines D.C. songs about anxiety and sensory overload, like "Starburster." Chatten hasn't explicitly said the song is about ADHD, rejection sensitive dysphoria, or task paralysis, so those themes remain relatable interpretations for us to draw ourselves.
• All five Fontaines members share writing credits. James Ford produced and mixed the track, while also contributing piano and programming.
  
  Instead of five guys plugging in and hitting record, the band assembled the track piece by piece in the studio. Guitarist Conor Curley explained they carried over the method from their previous album, Romance, holding off on live-band elements until they were strictly necessary. The arrangement opens with a tight electronic loop before guitars, piano, and strings gradually break through the cracks.
  
  Guitarist Carlos O'Connell ran Chatten's vocals through a sampler to alter their pitch, creating what the band called "a malicious extraterrestrial voice." The effect makes Chatten sound as if he is arguing with a distorted version of himself, matching the claustrophobic mood of the track.
  
  Bassist Conor "Deego" Deegan III manipulated the tape speed to give the bass line its loose, slouching feel. Inspired by classic recording techniques used by Prince, he pitch-shifted the instrument to give it the weight of a sampled hip-hop groove.
• There is plenty going on under the bonnet. Guitarist Conor Curley plays vibraphone, O'Connell and engineer Marta Salogni add synthesizers, and the Elysian Collective handle the string arrangement.
• "Tongue" is the sixth track on Dopamine Chamber. "The album itself is a dopamine chamber," Chatten explained. "You step inside and we test these different mind- or mood-altering pieces of music on you."
  
  He also mentioned exploring the concept of being "on the brink of some other kind of non-humanity," a sentiment clearly reflected here as Chatten's vocals are reshaped into something eerie and unfamiliar.
• John Angus Stewart directed the music video, using hand-held footage shot by the band members while wandering through New York City.