What Inspired the Song "Angel in Flip-Flops" in 'Only Murders in the Building' Season 2?

What, if anything, inspired the ‘Only Murders in the Building’ Season 2 certified bop “Angel in Flip-Flops”? The song was Charles’s only hit record.

Source: https://www.distractify.com/p/angel-in-flip-flops-only-murders-in-the-buiding