You could read the relationship as a love story or an allegory of two sides struggling to come together - East and West, Christian and Muslim, the have and the have-not - against the creeping influence of negativity.
It can, and has, also been interpreted as an allegory of the political, economic and social adventures of the late-nineteenth and early-twentieth centuries.
A story is an allegory of real life; the characters are allegories of real people, since you only take the important parts of their lives.
My first response upon rereading the book, largely thanks to my current preoccupations, was to interpret the story as an allegory about writing fiction.
For those who don't know, the story is a futuristic allegory of the Arab Revolt familiar to most through the film Lawrence of Arabia.
But then comes the coded ending, and you realize that Bagger is a symbol, an allegory , a pillar of life, death and whatever else.
Some feminist critics have interpreted Frankenstein as an allegory of childbirth which, in this case, is the product of solitary male propagation, being the proverbial scientist's brain child.
It is, for example, perfectly possible to read the poem as an allegory not of war but of the ‘war’ between the sexes.
And it's a story that expects us to take the superhero at face value; this boy-spider is not an allegory for anything, not a symbol for a class of people or culture.
The interactions between the characters in Springtime obviously form a political allegory , but rarely have I seen allegorical conceits that were as likeable as these characters are.