Bungalow Bob said
Keith Richards, through drugs and sheer neglect, had very bad teeth in those days. That probably accounts for some of his mumbling. I vaguely recall an article in Rolling Stone magazine that talked about Keith finally going to visit the dentist. It was titled "An old dog gets new teeth." :)
John & George knew of a good dentist in London...:-)
Linde said
the one of them singing wasn't them trying to be mean I think.
Being "mean" is something different than, as I said, "poking a little fun". There are better examples of The Stones being ...