“Never trust a skinny ice cream man”

“Never trust a skinny ice cream maker” was said by Ben Cohen (co-founder of Ben & Jerry’s) from at least 1991. The popular version of the quote is the slightly incorrect “Never trust a skinny ice cream man.”
 
Similar sayings include “Never trust a skinny chef” (cited in print since at least 1965) and “Never trust a fat dietitian” (cited in print since at least 1998).
     
 
Wikipedia: Ben Cohen (businessman)
Bennett “Ben” Cohen (born March 18, 1951) is an American businessman, activist, and philanthropist. He is a co-founder of the ice cream company Ben & Jerry’s.
 
14 July 1991, Chicago (IL) Sun-Times, “Sweet sounds to abound at Ben & Jerry’s jubilee” by Ernest Tucker, pg. 5:
“We have a saying around here: Never trust a skinny ice cream maker.”
 
3 July 1993, Washington (DC) Times, “Go ‘Scoop’ up this book”:
There is a new book about ice cream. It is all about two pudgy Long Island boys who make the world’s best ice cream. The book is called “Ben and Jerry - The Real Scoop!” You can learn a lot from this book. One of the thoughts of Chairmen Jerry and Ben is: “Never trust a skinny ice cream maker.”
 
Twitter
Bukhbayar
‏@bokhoo
RT @caffetiamo “Never trust a skinny ice cream man.” Ben Cohen http://twitpic.com/1j0abz
10:11 PM - 27 Apr 10
   
Google Books
Neverisms:
A Quotation Lover’s Guide to Things You Should Never Do, Never Say, or Never Forget
By Mardy Grothe
New York, NY: HarperCollins Publishers
2011
Pg. ?:
Never trust a skinny ice cream man.
BEN COHEN
 
Twitter
$@♏❕ goldstein
‏@Samiii_gold
“You should never trust a skinny ice cream owner, that means they don’t know their shit” 😂 wise words of pat Murray
5:08 PM - 28 Jul 13