Well if you have two small children of the same gender needing to used the outhouse in your back yard it mayI had an outhouse in our back yard
It was a two seater
I could see two different size holes but,,,,
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Looks liked something on a very cheap cruise ship.LOL
They stole all four wheels and left it on the street , jack up on the curb, with red bricks. LOL
We stayed in a B&B in London that had a bathroom just like this.
I saw something very similar in the back of an airplane one time. Except it was half the size of the one in the picture.
Now THAT'S how you take care of the three S's in the morning!
We're quickly coming to the point where most of the population will NOT fully get the joke!