Playboy, "The Fabulous Furry Freak Brothers": Happy Birthday, Gilbert Shelton!

Happy birthday to underground cartoonist Gilbert Shelton (born May 31, 1940)! From Playboy (I don't know which issue it originally appeared in, I scanned this from the book "Playboy: 50 Years: The Cartoons"), "The Fabulous Furry Freak Brothers"; story and art by Gilbert Shelton with assistance from Dave Sheridan.