Sometimes I see the structures of moments as jokes. In training actors and directors we often talk about Beats (or “bits” as someone alleged that Stansilavsky was actually saying with his Russian accent.) This whole Jephthah section is a curious beat and if it were a joke, it would seem to fall flat here. The punchline feels like it’s all at the top. Perhaps these quoted lines are a song and perhaps the melody provides a punchline that the strange vagueness of them doesn’t, but with the information I have in front of me, it sort of fizzles out.
Hamlet brings up a man who killed his daughter, calls Polonius that man and when Polonius accepts the offer, Hamlet blocks it and sings a nonsensical song. Maybe it’s a Monty Python sort of joke in which a man at a desk interrupts with something odd instead of ending the sketch.
The Hamlet Project 
Yes indeed 🙂 funnily enough in my other comment pon the saucy mouthed queen I were tempted to example Monty Python. 🙂
Most Monty Python sketches are simply and plainly not funny to us cos they’re making obscure references and insider jokes for the Oxbridge and BBC elite. Insider jokes are by definition not meant for public consumption. argal, they will fall flat when exposed to wider general audiences. That was partly the point of Monty Python, whether Cleese and Chapman, and Jones and Idle, and Gilliam and Palin knew it or not.
BBC hierarchy were taking the piss
…out of us! the general public.
Having said that it is possible to culturally train the general public to laugh at all Monty Python sketches and equally to compliment the Emperor on his funky new clothes. But that doesn’t transfigure the underlying naked reality.
Monty Python movies on the other hand, and Fawlty Towers and Fish Called Wanda etc are in my opinion generally much funnier cos they are definitely intended to be funny for wider audiences.