Brian Jones went into decline in the years after this song was released and was fired from the band in 1969, less than a month before he was found dead in his swimming pool. Keith Richards said in 1994: "Brian was still fantastic making records, because he was so versatile. I mean, he'd have marimbas - which is why you have marimbas on 'Under My Thumb' - or dulcimer, sitar. He kind of lost interest in guitar, in a way. But at the same time he added all of that other color, those other instruments and other ideas. He was an incredibly inventive musician."
Bertrand - Paris, France