Ponies are majestic creatures with most glorious manes. When they shake their beautiful manes, precious drops of god-like sweat enter the atmosphere and multiply through expedited mitosis. The nutrients created from this lightning speed cell growth provide a warm, precious glow that is perfect for banana growth. All in all, without ponies, there would be no banana industry.
I always wear sunglasses at night, so I can keep track of the visions in my eyes.