Many bodybuilders take steroids, but it can shrink the size of testicles. Although it is the testicles (balls) that shrink, there are also many penis jokes.
     
“what do you call a bodybuilder with a big penis? a beginner” was posted on the newsgroup rec.music.gdead on September 28, 2001. “Q: What do you call a bodybuilder with a big member? A: A beginner” was posted on the newsgroup alt.humor.jewish on December 8, 2003. “Q: What do you call a bodybuilder with a big penis? A: A beginner” was posted on eBaum’s World on November 11, 2007. “What do you call a bodybuilder with a big dick? A beginner. 😂” was posted on Twitter by “F.T.W. Frizol the wonderful” on April 9, 2019. “What do you call a bodybuilder with a large penis? A beginner” was posted on Reddit—Jokes on December 23, 2022.
   
“WHAT do you call a Bodybuilder with big balls ? A Beginner” was posted on Bodybuilding.com Forum  on July 1, 2003. “What do you call a bodybuilder with big balls? A beginner” was posted on Twitter by Classic Meathead on August 21, 2012. “What do you call a Bodybuilder with big balls? A beginner #OldButGold” was posted on Twitter by JJ on September 5, 2012. “‘What do you call a bodybuilder with big balls? A beginner.’– Unknown” was posted on Twitter by think.Mindful on March 24, 2017.
       
       
CNN—Health 
Bodybuilding steroids linked to long-term testicular damage, study finds
By Sandee LaMotte, CNN
Published 9:00 AM EST, Tue March 9, 2021
Men who use anabolic steroids to build muscle for that “perfect bod” may be harming their testicular function for years after they stop taking the drugs, according to a new study of nonathletic bodybuilders.
 
“It has been unclear whether illicit use of anabolic steroids caused a long-lasting or even persistent impairment of the testosterone production in the testicles,” said study author Dr. Jon Rasmussen, a scientist at Rigshospitalet, a highly specialized hospital affiliated with the University of Copenhagen.
 
Google Groups: rec.music.gdead
Free show
Sachin
Sep 28, 2001, 5:24:08 PM
(...)
what do you call a bodybuilder with a big penis?
a beginner.
 
Bodybuilding.com Forum 
07-01-2003, 06:29 AM#2
AussieTank
WHAT do you call a Bodybuilder with big balls ?
A Beginner
   
Google Groups: alt.humor.jewish
Quips
Renee
Dec 8, 2003, 10:19:13 AM
(...)
Q: What do you call a bodybuilder with a big member?
A: A beginner.
 
eBaum’s World 
Bodybuilder
Featured 11/11/2007
Q: What do you call a bodybuilder with a big penis?
A: A beginner.
   
Twitter
Classic Meathead
@ClassicMeathead
What do you call a bodybuilder with big balls? A beginner.
11:57 PM · Aug 21, 2012
   
Twitter
JJ
@jasonj85
What do you call a Bodybuilder with big balls? A beginner #OldButGold
1:49 PM · Sep 5, 2012
   
Twitter
Charles
@CDCarr29
what do you call a Bodybuilder with big balls ? 
A Beginner!
7:13 PM · Apr 6, 2014
   
Twitter
think.Mindful
@think_mindful
“What do you call a bodybuilder with big balls? A beginner.”
– Unknown
- http://thinkmindful.com/bodybuilder-unknown/
3:01 AM · Mar 24, 2017
 
Twitter
F.T.W. Frizol the wonderful.
@BobFrizol61
Replying to @nitehack99
What do you call a bodybuilder with a big dick? A beginner. 😂
2:18 AM · Apr 9, 2019
 
Twitter
F.T.W. Frizol the wonderful.
@BobFrizol61
What do you call a bodybuilder with a big penis? A beginner.
6:39 PM · Aug 14, 2019
 
Twitter
F.T.W. Frizol the wonderful.
@BobFrizol61
Replying to @thekjohnston
What do you call a bodybuilder with a large penis? A beginner.
10:20 AM · Jul 10, 2020
 
Twitter
Dean Baxter
@DBaldingBaxter
Replying to @Timbo55081
LOL what do you call a bodybuilder with a 6” dick? ….A beginner 😂🤣
6:34 PM · Jul 27, 2021
 
Reddit—Jokes
Posted by u/1-_Nyxxit December 23, 2022
What do you call a bodybuilder with a large penis?
A beginner.
COMMENTS
JusKeepShootingNemo
I mean this joke does have some truth to it and I’m not talking steroids after awhile of training legs for us men our legs start to become so big they overcompensate for other things 🙁🙁
 
Twitter
Mr. Drinks On Me
@Mr_DrinksOnMe
What do you call a bodybuilder with a large penis?
A beginner.
6:31 PM · Dec 23, 2022