Wrong Side of the Tracks: The Rolling Stones: In Conversation

What is it which still drives The Rolling Stones, all well into their 70s (with the exception of guitarist Ron Wood) to continue to commit to the grueling grind of international touring year after year? Although they all have large families it certainly can't be the money anymore. They pretty much all stopped drinking and drugging, and despite their sometimes outrageous appearance lead fairly conservative familial lives. The wild adulation of the fans, let's face it, after 50+ years must, b...