I've always loved this song musically, but was slightly averse to it thinking the lyrics were somewhat condescending to Stevie's former wife and songwriting partner Syreeta. Then I read that the song is
actually about Stevie's troubled relationship with Motown boss Berry Gordy (e.g., "Mary"/"Berry", "wants to be another movie star"/Motown going into films, "Try to boss the bull around" - Stevie's sun sign Taurus the Bull/"Black Bull Productions" etc.).
https://www.youtube.com/watch?v=U-ohttPIqco