Martin hopes to help all of his students tangibly further themselves as musicians, as well as meeting the goals of the course. He says the most important advice he ever got was to only speak when you have something to say — a lesson he applies to music.
“Thank U, Next”: The sustain of that dreamy electric piano in this chord loop solidifies the G♭ chord as a G♭M13 and the F chord is an F7(#9) secondary dominant (V/vi )! Then we have a regular B♭m before returning to the tonic — but not so fast! We haven’t really returned home, since it’s a D♭7, another secondary dominant (V/IV) that sends us back to G♭M13. These secondary dominants act like coal nuggets to fuel a perpetual motion chord-loop machine. Form-wise, you could also call the chorus extensions “post-choruses,” but I already used up my “P” for the pre-chorus sections, so I’ll just call these extensions “variations” and be done with it.