"Can't Nobody Love You"

I've noted before that the lines "Oh, I'm gonna love you in the morning / Love you late at night" in "Can't Nobody Love You" contain a temporal merism, but when I listened to Begin Here again recently, I noticed that the extent here is also illustrated by the melody.  "Morning" is sung to Fs, but "night" is sung to lower pitches (and with a melisma:  E A).  At the greatest distance, there's a sixth between "morning" and "night."