The Horrors' song "I Took A Deep Breath And I Kept My Mouth Shut" is about the struggle to keep quiet and not express one's true feelings. The song speaks of a moment where the narrator wants to say something, but instead chooses to remain silent and hold their breath. This could be interpreted as a reaction to a difficult situation or a relationship, where the narrator does not want to cause conflict or hurt someone's feelings. They choose to suppress their own emotions and internalize their thoughts, even though it may be causing them pain. The lyrics suggest that this behavior is not sustainable, as holding one's breath eventually leads to exhaustion and the need to exhale. The narrator is struggling to find a balance between expressing themselves honestly and avoiding conflict. Overall, the song portrays the internal struggle of keeping quiet in order to maintain the status quo, while also acknowledging the toll that suppressing one's emotions can take on a person.