A popular sexist sports joke is:
 
Q: What’s the difference between a feminist and a hockey player?
A: A hockey player showers after three periods.
 
The “feminist” in the joke was cited on Twitter on July 14, 2014. However, the joke has been cited from at least 1988 and 1991, also describing hockey groupies, cheerleaders (of opponent teams), Italian housewives, brunettes and other women.
     
   
Google Books
The Jock Joke Book
By Ewell Wince
Toronto, ON: PaperJacks
1988
Pg. 85:
Why is a hockey player like a hockey groupie?
They both change their pads after every three periods.
 
Google Books
1,001 Great Sports Jokes
By Jeff Rovin
New York, NY Signet
1991
Pg. 174:
Q: What’s another difference between a hockey player and an Italian housewife?
A: After the third period, the hockey player showers.
   
Google Groups: alt.tasteless.jokes
blond jokes
Patrick M Hanna
10/13/93
(...)
what does an italian woman and a hockey player have in common?
 
they both shower after the 3rd period!
       
Google Groups: alt.tasteless.jokes
Kornhusker Joke
Checked for speling errors
3/22/94
(...)
Q. Whats the difference between a U of N cheerleader and a hockey player?
A. A hockey player showers after three periods.
 
Google Groups: alt.tasteless.jokes
Jesus jokes
Jim Miller
10/24/94
(...)
OB Joke -
What’s the difference between a Hockey Player and Polish Woman?
At least the hockey player changes his pads after 3 periods.
 
Google Groups: rec.humor
MORE SICK JOKES FROM MATT H
Matthew Harrington
4/19/95
(...)
What is the difference between a hockey player and a Porta Rican girl ?
The hockey player takes a shower after three periods !!
 
Google Groups: rec.humor
Courtney Love and Hockey Player
.(JavaScript must be enabled to view this email address)
5/29/96
I heard this on “Love Phones.”
Q:  What is the difference between a hockey player and Courtney Love?
 
A:  The hockey player showers after three periods.
 
Twitter
Mick_Shrimpton
‏@Mick_Shrimpton
What’s the difference between a hockey player and a female bass player? ...The hockey player showers after three periods…
12:08 PM - 16 Apr 2009
 
Twitter
Ryan Field
‏@rrfieldyy
whats the difference between a hockey player and a stripper?  a hockey player showers after 3 periods
9:35 AM - 28 Sep 2009
   
Google Books
The Ultimate Book of Blonde, Brunette, and Redhead Jokes
By James Buffington
Berekeley, CA: Ulysses Press
2010
Pg. 151:
What’s the difference between a brunette and a hockey player?
A hockey player takes a shower after three periods.
 
Twitter
ROBYN
‏@Lilrobro
“Whats the difference between a hockey player & a hippie?...what? The hockey player will shower & change his pads after 3 periods"hahaha! Ew
10:30 PM - 16 Mar 2010
 
Twitter
Detroit
‏@HG_DetroitGMC
Whats the difference between a hockey player and a feminist?
A hockey player showers after 3 periods
10:27 AM - 14 Jul 2014
 
reddit
What’s the difference between a hockey player and a feminist hippie chick? (self.Jokes)
submitted November 19, 2014 by AlphaEag1e
A hockey player will take a shower after three periods.
 
reddit
What’s the difference between a feminist and a hockey player? (self.Jokes)
submitted January 5, 2015 by EvelKnievelsBike
A hockey player showers after 3 periods.
   
reddit
What is the difference between a feminist and a hockey player? (self.Jokes)
submitted March 9, 2016 by donquixote1991
A hockey player showers after three periods!Iwillseemyselfoutnow