NSFW. From Funny Or Die.
Wednesday, August 24, 2011
A little background from Wikipedia for the young or uninformed:
"Rowan & Martin's Laugh-In" is an American sketch comedy television program which ran from 1968 to 1973. It was hosted by comedians Dan Rowan and Dick Martin and was broadcast over NBC. Cast members included Lily Tomlin, Henry Gibson, Goldie Hawn, Arte Johnson, Ruth Buzzi, Jo Anne Worley, Richard Dawson and more. Recurring guest stars included Jack Benny, Johnny Carson, John Wayne, Flip Wilson, Zsa Zsa Gabor, Henny Youngman and Sammy Davis, Jr. The show's writing staff included Lorne Michaels (Saturday Night Live) and Larry Siegel (Mad magazine).
Their letter to Wayne after one appearance: