Mick Jagger: Teaching would have been more gratifying he's one of the most successful rock singers in history that -- -- -- another career. might have given him more satisfaction. 69 year old told BBC radio Friday that music has not been intellectually challenging and and teaching it might have been more gratifying. For the British rocker says he's not pleased at how things have turned out. Well I'm not too late -- yeah. It's too late -- it's too late to deliver deeper.