Yes, academics have written lengthy analyses of dirty jokes and limericks. PJs and elephant jokes also deserve further study.
Have you ever wondered why there are so many elephant jokes, a small number of dog and cat jokes and hardly any jokes involving tigers and lions? Then there are phrases such as the “elephant in the room”.
See what Wikipedia has to say:
And there are elephant limericks, although this one does not depend on the elephant:
A young man in sunny Yuma
Told an elephant joke to a puma.
Now his skeleton lies
Under desert skies.
The puma had no sense of huma.
Another indirect elephant joke:
A small boy misreads a sign at the zoo which says “African elephant”. He tells his father that he saw a frickin’ elephant.
And there are off-colour elephant jokes, such as these:
Learn something new: the two-humped camel is known as the Bactrian camel. Some can be seen in Ladakh. Presumably their ancestors had got lost when the Central Asian caravans were passing through some centuries ago.
For the moment, you need to remember than the one-humped variety found in most of western India and West Asia should correctly be called a dromedary.
The camel has a distant cousin called the llama. It has been immortalized in puns, besides verses like these:
An one L lama is a priest,
A two L lama is a beast.
I bet my silk pajama
That you can’t find a 3 L lama.
(One of the “model answers” is a trainee llama who wears a L plate.)