Hey! I've just been learning the parts to "YCAGWYW" by the Stones and I'm a bit confused by a bit on the post-chorus part that Mike teaches with guitar 2 (the lead electric guitar), where there's some sweet sounding sixth intervals going on. The chord progression is going from a C major to an F major and the song is supposedly key of C but all the intervals being used in this section seem like they're straight from the key of F. For example, the C chord is highlighted initially with a slide into the E note (14th fret of the D string) and C note (13th fret of the B string) and then slides backwards with a slide to the D note (12th fret of the D string) and 11th fret of the B string which is a Bb note and obviously isnt in the C major scale but is in F major. All the other intervals in this section also seem to be straight out of the key of F major. Just wanted a bit of clarification on this.

Cheers,

Will