Richard Dawkins opens this fourth lecture of his Royal Institution Christmas Lectures series by recalling a conversation with a little girl who told him flowers exist "for" people, to be picked and enjoyed. He uses her answer as a way into the lecture's actual argument: that flowers evolved their colors, shapes, and scents to attract pollinating insects, not to please human eyes, and that the belief the natural world was made for our benefit runs deep, from Genesis through centuries of Western thought. The title comes from the lecture's central demonstration, images of flowers photographed in ultraviolet light, revealing petal patterns and landing guides invisible to us but plainly visible to bees. Dawkins uses these UV views alongside live specimens and simple physics to walk a young audience through natural selection's alternative to design: no intention, just insects and plants shaping each other over generations. It is one episode in a five-part series, aimed at children but built on the same evidence he uses with adults.