Nathan Willett explained in a Genius
attribution how this was inspired by the eternal question of how much you should disclose about old relationships after hooking up with a new love interest:I told you the truth about the old me
And now you use confession as the proof
He said: "With every new relationship, you either talk about previous relationship stuff (warts and all), or you just pretend like they never existed. Both are kinda terrible. When you go the full disclosure route it's probably sincere, maybe you're even praised for your vulnerability. However, you know it's probably gonna be used against you later, in a fight, in the worst way."