Welcome to the first song, Both Hands.
This groove came from a concept of longing to love someone. The desire to love that person is so extreme, you would need BOTH hands to love them properly. The reoccurring IV Minor cadence has always sounded wistful and melancholic to me.
Watch my right hand closely to see the slaps I do on the 2nd and 4th beats. That really adds to the groove.