Theorists on humour (yes, there are people out there who spend their lives working out why we laugh) all agree that one of the first sorts of a humour any person learns is toilet humour: bum jokes. It’s what leaves kids laughing hysterically, and it can still tickle an adult’s funny bone when done just right. One of the greatest parts of being a plumber working in Sydney, or indeed anywhere in the world, is that you get to see a lot of interesting and amusing bathroom signs – the birthplace of all toilet humour. Here’s just a few of our favourites:

(image source: Shutterstock)

1.      The All-Inclusive Toilet:

It’s nice to know that even aliens and robots have a place to pee.

 (image source: https://www.boredpanda.com/funny-bathroom-signs)

2.      The Research Purposes:

Well that sure puts me at ease.

3.      The Hive:

Maybe wait until you find another toilet.

(image source: http://4.bp.blogspot.com/-iGdok9Uws9I/TxRb3_h_BkI/AAAAAAAAEI8/JGoYnIfyUKc/s1600/toilet+beware+of+bees+dr+heckle+funny+sign+blog.jpg) 

4.      The Strangely Confusing:

Something Freudian going on here…I wonder what they could be implying?

(image source: http://www.mileanhour.com/files/2011/7/5107.jpg) 

5.      The Subtly Honest:

No hard feelings, okay?

(image source: http://i.imgur.com/xrzG2.jpg) 

6.      The Strangely True:

I suppose that’s right, in a very odd way.

(image source: http://2.bp.blogspot.com/-QnV4Y7AJhFg/TqO18o7-SwI/AAAAAAAAAvQ/o4y89KmnbAw/s1600/IMG_0131.JPG)

7.      The Strangely Specific:

Wait, can women without fish still use this toilet?

(image source: http://farm1.staticflickr.com/124/366017908_f815d7ca20.jpg)

8.      The Helpful Hint:

Just in case you forget how going the toilet works.

(image source: https://www.boredpanda.com/funny-bathroom-signs) 

9.      The Truthful Representation:

In Japan, they know exactly what face you’re going to pull when you go to the toilet.

(image source:http://cdn.smosh.com/sites/default/files/bloguploads/funny-bathroom-sign-htl.jpg) 

10.  The ‘I Hope I Got This Right’:

The last thing you want when you’re desperate to pee is a little brain teaser. Seriously, I’m stumped.

(image source: https://www.boredpanda.com/funny-bathroom-signs