My daughter is a math teacher, so I know why this occurs. It's the mathematical rules of the Fibonacci numbers. The Fibonacci sequence determines the patterns of everything in nature, from the number of petals in a flower species, to the arrangement of bracts on a pinecone or pineapple. The Golden ratio, based on the numbers, creates the beauty that we see. Most people don't look closely enough to notice, but those who appreciate natural beauty will pay attention to those little details.