in your video "gonna clean my room" the song goes that you'll clean your room after the 'sun burns out' and the 'sky falls down' so there's an interesting connection, added on top of that 'sun is not very bright' coincided with 'sun burns out.'
the sky and sun have been up there all my life. so they both commonly come to mind often. so that 'connection' is probably shared by a huge percentage of my songs. unless i'm deliberately trying to cut back