Below is just one of those responses — a handwritten reply from Ken Kesey, author of One Flew Over the Cuckoo's Nest.
Transcript follows. Image courtesy of the wonderful Glenn Horowitz.

Image: Glenn Horowitz
Transcript
Kesey
[Redacted]
Dec 15, 1986
James Harmon
[Redacted]
Dear James:
Here's some advice I have been giving to just-marrieds over the last decade or so:
Don't say it. It's too hard to take it back. I've seen too many loves sundered by too much needless honesty. These psychological ding-dongs that tell people to speak their minds to their mates, to vent their spleens? What do they accomplish? All they produce is a lot of lonely self-righteous minds & ventilated spleens.
Ken Kesey
P.S. Faye & I have been married 35 years. KK