Another obscure one from Between the Buttons. That album, besides being a step in the Stones’ evolution from Chuck Berry-aping r’n'b to a more psychedelic sound, is also the moment when they started letting Keith get behind the microphone. Connection is a duet, with Mick’s vocals being more prominent. Lately, though, Keith’s adopted it as one of his signature tunes. He made it a part of his set when he played solo, and it’s been dusted off again on the most recent Stones tour.