“Pun of the Day:  Swimming can be easy or hard. It deep-ends”—a pun on “depends”—was posted on Twitter by Rosa Lei Steinard on December 1, 2009. “Swimming can be easy or hard. It deep-ends” was printed in the book A Man Walks Into a Bar 3: The Ultimate Collection of Jokes and One-liners (2010) by Jonathan Swan.
     
“Is it safe to jump in the pool? It deep ends” was posted on Twitter by Puns With Toys on December 20, 2013. “Is this pool safe for diving? It deep ends” was posted on Twitter by Dad Jokes on April 13, 2014.
   
   
Twitter   
Rosa Lei Steinard.
@Lensman23
Pun of the Day:  Swimming can be easy or hard. It deep-ends.
10:42 AM · Dec 1, 2009·Twitter Web Client
       
Google Books
A Man Walks Into a Bar 3:
The Ultimate Collection of Jokes and One-liners
By Jonathan Swan
London, UK: Ebury Press
2010
Pg. 353:
Swimming can be easy or hard. It deep-ends.
 
Twitter
Cori Yule
@corrior
Swimming can be easy or hard. It deep-ends
9:09 PM · Feb 22, 2010·Twitter Web Client
   
Twitter
Adaora
@MsAdaO
I really wanna learn how to swim…Swimming can be easy or hard. It deep-ends!
6:34 AM · Feb 28, 2010·Twitter Web Client
   
Twitter
BRUH™
@Starlitoz
Lol “@BabaKayai: Q. Can one drown in a swimming pool? A. It deep ends”
2:55 PM · Aug 12, 2013·Twitter for BlackBerry®
   
Twitter
Puns With Toys
@PunWithToys
Is it safe to jump in the pool? It deep ends.
8:12 AM · Dec 20, 2013·Twitter for Android
   
Twitter
Dad Jokes
@dadsjokes
Is this pool safe for diving?
It deep ends.
(thanks Jason)
11:23 PM · Apr 13, 2014·Facebook
   
Twitter
Megan Borg
@102megan
“Is the pool safe for diving?”
“It deep ends.”
7:46 AM · Jul 21, 2014·Twitter Web Client
 
Reddit—Dadjokes
Posted by u/tweeraIsTaken August 15, 2015
Is this pool safe for diving?
It deep ends
Source: itunes app
       
GQ
What Makes a Dad Joke a Dad Joke
“Hi hungry, I’m Dad.”
BY MAGGIE LANGE
June 17, 2016
(...)
→ Is the pool safe for diving? It deep ends. (CLASSIC DAD JOKE.)
 
Reddit—Dadjokes
Posted by u/slightlee_browne November 18, 2016
Are pools safe for diving?
It deep ends.
   
Reddit—Jokes
Posted by u/ahairynail April 13, 2017
How deep is a swimming pool?
It deep-ends.
     
Elite Daily
Dad Jokes You’ll Always Appreciate No Matter What
BY ALEXANDRA STRICKLER
JUNE 9, 2017
(...)
1. Is this pool safe for diving? I don’t know, it deep ends.
     
Fatherly
55 Great Clean Jokes for Funny People Who Don’t Swear
These jokes will either have your kids in stitches or cause them to roll their eyes.
By Alicia Kort Updated Aug 12 2020, 1:00 PM
(...)
38. Is this pool safe for diving?
It deep ends.
 
Reddit—Dadjokes
Posted by u/notdadbot October 26, 2019
Is the pool safe for diving?
It deep ends.
   
Twitter
jimmy stays-at-home
@JimVanWyck
Swimming can be easy or hard. It deep-ends.
11:33 AM · Jul 7, 2020·Twitter Web App
 
Reddit—Cleanjokes
Posted by u/madazzahatter August 17, 2020
My son asked me, “Is this pool safe for diving?” I chuckled and replied…
“It deep ends…”