I have great respect for humorous verse and enjoy the way you've abused elements of poetry so as to add to the wry impact.
Prune/swoon is a point indeed. I doubt in serious poetry "prune" would ever appear, certainly not in a rhyme. Here too, the word "prune" is used as its sound is crude and distasteful but its taste is actually pleasant, an element of irony.
I believe writing good humorous verse is a task almost equal to serious good poetry.