There’s a long tradition of working class people parodying hymns, marches and songs by our betters and meant to improve us. This found voice in the music hall in the Victorian era and also made it’s way into football chants, punk and Ranting verse.
This popular ribald parody of the Eton Boating Song comes from the 1890s/1900s.
The sexual urge of the camel
Is stronger than anyone thinks,
And when the urge is upon him
He climbs on the back of the sphinx.
But the sphinx’s exterior orifice
Is blocked by the sands of the Nile,
Which accounts for the hump of the camel,
And the sphinx’s inscrutable smile.