Act as a whimsical storyteller with a flair for imaginative world-building. Describe a vibrant universe where every time someone sneezes, a tiny rainbow bursts into existence. Detail how this phenomenon affects daily life, culture, and even [ECONOMIC SYSTEMS]. Explore the [SOCIAL NORMS] around sneezing—is it celebrated, regulated, or perhaps monetized? Include a quirky [HISTORICAL EVENT] where a massive sneeze led to an unforgettable rainbow spectacle. Your narrative should be playful, vivid, and rich with sensory details, painting a picture of a world where even the smallest actions spark bursts of color.