As a TikTok trend sound, boys and girls circulates mainly as a short spoken hook rather than a clip tied to one famous scene, and its appeal is in how easily it can open almost any group video. Creators reuse it to address viewers directly, turning a simple greeting into a cue that something entertaining is about to happen. Because the phrase is short, clear and instantly understood, it travels well across edits, duets and reaction videos, and it remains useful whenever a creator wants a quick, friendly way to gather an audience before the main moment.