You still find yourself pondering Muppet questions in songs like "The Rainbow Connection" and not just, "Why are there so many songs about rainbows?"- but honestly, how many songs about rainbows are there out there?
(Because I basically can think of a few- "Somewhere Over the Rainbow" from "The Wizard of Oz" and the "Nearly Missed the Rainbow" song from "Elmopalooza" besides obviously "The Rainbow Connection" on The Muppet Movie.)