What a grotesque title for such an accomplished song. Here again we have a heavy song that has not forgotten that it is actually managing harmony within the noise. The chord and melody choices are extremely unique and interesting, regardless of the hard rock context. Energy plus intelligence: So sexy.
The verse vocal is at once snarly and crooning, with the main melody line ending in a particularly sweet scale down, the notes each bending down into the next over fun intervals. The guitars move in a tight knot of chords, with some ugly chromatic steps adding grind.
There is a disturbing little pre-chorus with dissonant vocal harmonies, resolving sweetly down into a groove on a pure-STP suspended chord. You can HEAR those additional notes in the chords of STP songs - they loved advanced harmony, treated it like the fun it should be, knowing the fuzz of their guitars added to the overall dissonant feel. STP guitar fuzz owed a lot to the Led Zeppelin guitar sound, where distortion was present but not overpowering the signal.
But my greatest love is the slide guitar of the chorus, clawing up and down the fretboard, exploiting one of my favorite Principles of Heaviness (see many previous posts): Two notes, wide interval. The guitar here slides high-low over a good gaps, with the third interval the sweetest and most radical. It's so off the course that it almost changes the key of the song; only a carefully wrought transition following returns the song back to its tonic. The vocal rides over this part with rousing confidence, finishing lines in growling vibrato.
Nothing is quite so affirming as heavy music in major keys, but not schmaltzy - employed with sophistication, flecked with abstraction and ambivalence. And that's what the chorus delivers above everything. It turns the heavy into a dizzy spell, robbing the dopey "happy song" practitioners of their precious tonality, bending (mending) it into an unnatural rarity.