R. Crumb's Mr. Natural character is real and teaches music in SF

In the late 1960s, a mysterious, aphorism-spouting cartoon character by the name of Mr. Natural — part con man, part saint — became a favorite counterculture guru. Wisely practical yet frustratingly ludicrous, he was spawned from the brain of underground San Francisco "commix" icon Robert Crumb in 1966. But what most fans have overlooked is that Mr. Natural is an actual living person who has run a music school in San Francisco's Haight-Ashbury District for more than 30 years.