“Toiletry” is not “toilet tree” and “lavatory” is not “lavatree,” but there are jokes.
   
“Clara: ‘where does toilet paper come from?’ Me: ‘uhh..where..’ Clara: ‘Toiletries!!!!’ ME: LOOOOOOOOOOOL” was posted on Twitter by Ange on April 6, 2011. “Kid1: Where does toilet paper come from?.... a toiletry” was posted on Twitter by Adventurebaby on March 4, 2012. “Where does toilet paper come from? Toiletrees” was posted on Twitter by Trev on February 6, 2018.
   
“Where do toilets come from? They grow on lavatrees” was posted on Twitter by Crap Gag Of The Day on November 15, 2012.
 
“I just made up another joke. ‘Where do toilets come from? ‘........ ‘Toiletries’” was posted on Twitter by The Hub Roseville on April 14, 2014. “Where do toilets come from? They grow on toiletries” was posted on Reddit—Dadjokes on June 15, 2018, and again on Reddit—Jokes on October 8, 2020.
 
         
Merriam-Webster Dictionary
toiletry noun
plural toiletries
: an article or preparation (such as toothpaste, shaving cream, or cologne) used in cleaning or grooming oneself —usually used in plural
 
Twitter
Ange
@LOLitsange
Clara: “where does toilet paper come from?” Me: “uhh..where..” Clara: “Toiletries!!!!” ME: LOOOOOOOOOOOL
7:53 AM · Apr 6, 2011·Twitter Web Client
   
Twitter
Adventurebaby
@Adventurebaby
Kid1: Where does toilet paper come from?.... a toiletry.
5:57 AM · Mar 4, 2012·Twitter for iPhone
 
Twitter
Crap Gag Of The Day
@CrapGagOfTheDay
Where do toilets come from? They grow on lavatrees.
4:01 AM · Nov 15, 2012·Twitter Web Client
     
Twitter
BJ
@BJ_Ramone
Where does Toilet Paper come from? Toiletries? #pun
7:19 PM · Apr 9, 2013·Echofon
   
Twitter
Mike Bisicchia
@Bisich
Where does toilet paper come from?
From toiletries.
7:56 PM · Mar 19, 2014·Twitter for iPhone
 
Twitter
The Hub Roseville
@norcalhubbikes
I just made up another joke. “Where do toilets come from? “........ “Toiletries”
10:11 PM · Apr 14, 2014·Twitter for Android
     
Twitter
Gian D’Oh
@GianDoh
Daddy where does toilet paper come from?
TOILETRIES, SON.
Dad why are your jokes so bad?
BLOCKED.
6:20 AM · Nov 14, 2014·Twitter for iPhone
 
Twitter
Trev
@GG_Trev
Replying to @KingKarloff89 and @MCTAYLO
Where does toilet paper come from?
Toiletrees
GIF
9:15 PM · Feb 6, 2018·Twitter for Android
 
Reddit—Dadjokes
Posted by u/hwachob95 June 15, 2018
Where do toilets come from?
They grow on toiletries
     
Twitter
keepingitcreel
@Keepingitcreel
Where do toilets come from? They grow on toiletries
4:49 PM · Jun 15, 2018·IFTTT
     
Twitter
thiccdadsofinstagram
@thiccdadsofins1
Where does toilet paper come from? A toilet-tree. (Pronounced toiletry for you dumbasses).
12:41 PM · Jan 15, 2019·Twitter Web Client
   
Twitter
Craig Peihopa
@timelinephoto1a
I love things of creative interest and this toilet tree lived up its botanical name lavatree. #dorrigo #northcoastnsw #craigpeihopa #timelinephotographyau @ Dorrigo, New South Wales https://instagram.com/p/BtDLr2VF7GV/?utm_source=ig_twitter_share&igshid=1e0h5eldfldp3
2:49 AM · Jan 25, 2019·Instagram
   
Reddit—Dadjokes
Posted by u/denbroc December 6, 2019
Where does toilet paper come from?
Toiletries.
COMMENTS
Mullet0ver
You’re on a “roll”.
 
Twitter
CrownKittyKleinRibbon
@kittykl22345039
@LaffyTaffy
Where does toilet paper come from?
A: Toiletries (toilet trees)
You’re welcome
7:06 PM · Jan 25, 2020·Twitter for iPhone
 
Reddit—Jokes
Posted by u/mr_donald_nice October 8, 2020
Where do toilets come from?
They grow on toiletries..