“What’s the difference between snowmen and snowwomen?”/“Snowballs.”

A snow riddle is:
 
Q: What’s the difference between snowmen and snowwomen?
A: Snowballs.
 
The riddle was printed in a 1975 newspaper and a 1981 book.
 
Other snowball riddles include “What do you call a snowman party?”/“A snowball,” “What kind of ball doesn’t bounce?”/“A snowball” and “Where do snowmen go to dance?”/“To a snowball.”
     
 
Old Fulton NY Post Cards
13 December 1975, Olean (NY) Times Herald, “What’s The Scoop” (Archbishop Walsh High School), pg. 22, col. 7:
WHY DON’T YOU ASK
The difference between a snowman and a snowwoman?
   
Google Books
Players and Pretenders:
The Basketball Team That Couldn’t Shoot Straight
By Charles Rosen
New York, NY: Holt, Rinehart, and Winston
1981
Pg. 224:
Q. What’s the difference between a snowman and a snowwoman?
A. Snowballs.
 
Google Books
The Thoroughly Tasteful Dirty Joke Book
By Shelli Sonstein
New York, NY: Stein and Day
1984
Pg. 29:
The difference between snowmen and snowwomen is snowballs.
 
Google Books
The Wall Street Joke Book:
Raunchy Humor From Fast-Lane Financiers
By Four Anonymous Wall Street Guys
New York, NY: St. Martin’s Press
1997
Pg. 12:
Q: What’s the difference between snowmen and snowladies?
A: Snowballs.
 
Twitter
brandyismagic
‏@brandyismagic
From a kid “What’s the difference between snowmen and snowwomen?” “Snowballs!” And yes, it’s cold enough here to still make that joke. Sigh.
2:20 PM - 27 Apr 2008
 
Reddit—Jokes
What’s the difference between a snowman and a snowwoman?
submitted April 21, 2013 by hodorlederhosen
Snowballs!
 
Google Books
Have Yourself a Ridiculous Little Christmas:
A Christmas Story
By Paul Richards
Bloomington, IN: Booktango
2014
Pg. ?:
“What’s the difference between snowmen and snow ladies? Snow balls.”
   
Reddit—Jokes
What is the difference between a snowman and a snowwoman?
submitted November 3, 2014 by boberto4567
Snow balls.