“Did you get a haircut?”/“No, I got them all cut.”

Getting a haircut does not mean getting a single hair cut, but the popular dad joke exchange is:
 
WIFE: Did you get a haircut?
HUSBAND: No, I got them all cut.
 
Versions of the joke have been cited in print since at least 1899 and 1907.
. 
 
Newspapers.com
5 September 1899, The Inter Ocean (Chicago, IL), “Innocent Childhood,” pg. 8, col. 6:
“Go get a hair=cut!” said little Benjamin, trilling a happy laugh.
 
“Get them all cut, sir,” earnestly cried little George; “one is as bad as the other.”
     
Newspapers.com
8 January 1907, The Daily Arkansas Democrat (Little Rock, AR), “Half a Dozen Smiles,” pg. 4, col. 3:
Myer—I’m going over to the barber shop to get a haircut.
Gyer—Why don’t you get them all cut while you are at it?—Chicago Daily News.
     
Newspapers.com
4 March 1914, The Scott County Journal (Scottsburg, IN), pg. 6, col. 6:
Helping Him Out.
Jones—I have a quarter. I think I’ll go get a haircut.
Brown—Here’s a dollar. Get them all cut.
 
Newspapers.com
27 October 1970, Troy (NY) Record, “Fun Time—The Chuckle Box,” pg. 14, col. 1:
Jack: Did you get a haircut?
Jim: No, I got them all cut.
 
Twitter
Garfield’s Insults, Put-Downs, and Slams
By Jim Davis
New York, NY: Ballantine
1994
Pg. 47:
Did you get a haircut?
No, I got them all cut.
 
McSweeney’s Internet Tendency
JUNE 13, 2014
DAD’S JOKES EXPLAINED
by BEN ROSEN
(...)
YOU: DAD, YOU SHOULD GET A HAIRCUT.
DAD: I USUALLY LIKE TO GET THEM ALL CUT.
This one is funny because it sounds like you want him to get only one of his hairs cut. How crazy would that be?
 
Reddit—Dadjokes
Posted by u/rlgraves July 4, 2018
Dad, did you get a hair cut? Dad-Nope I got them all cut!
COMMENTS
DoctorMasochist
I remember this joke from Mork and Mindy. Robin Williams had long hair on the show and Mindy asked if he got a haircut. Robin’s response was “Nope, I got ‘em all cut.”
 
Reddit—Dadjokes
Posted by u/Royalprincess19 November 24, 2018
Dad,did you get a haircut?No I got them all cut.