The song "Spider-Flies" by David0Mario talks about the singer's fascination with fireflies and his struggle with insomnia. He imagines a surreal world where fireflies light up the sky and try to teach him how to dance. The lyrics describe the singer's desire to escape his sleepless nights and his longing for a sense of wonder and magic in his life. The song captures the bittersweet feeling of being caught between the desire to stay awake and the need to rest, and the yearning for a world where everything is not as it seems. The upbeat and catchy melody, combined with the whimsical and dreamy lyrics, creates a sense of longing and escapism that resonates with many listeners.