Keith Richards actually died sometime in the 1960s. There are two common explanations as to why he’s still performing:
1. He took so many drugs that his dead body has literally been perfectly preserved so despite his heart not beating he’s still around.
2. Someone raised Keith Richards’ corpse, so he is actually a zombie or some other form of undead. Only instead of “Brains! Brains!” he seeks “Booze! Drugs!”
:P
“Keith Richards says kids should not do drugs. Keith, we can’t do any drugs, because you already done them all, there’s none left. We have to wait until you die so we can smoke your ashes.” - Dennis Leary