Andy Razaf also penned the lyrics to Fats Waller classics like "Ain't Misbehavin," "The Joint Is Jumpin'", and "Keepin' Out of Mischief Now".
I understand, in theory, it's possible to perform "Ain't Misbehavin'" and sing it straight but... but I find it almost impossible not to vamp it up and sing it tongue-i cheek. ("I'm saving all my love for. And you And you. Oh, and you!")