Introduction: hook, call to action.
Body paragraph: claim, evidence
Conclusion: summary, rebuttal
Aphorism is an original laconic phrase conveying some principle or concept of thought while allegory is the representation of abstract principles by characters or figures.
Both W. H. Auden and William Carlos Williams wrote ekphrastic poems about Pieter Brueghel's Landscape with the Fall of Icarus. Both poems point out that Icarus’s drowning is ignored or goes unnoticed. Williams's poem uses short groups of three lines and an objective tone. Auden's poem uses longer lines and more description, and it refers to ideas and images outside of the painting. Williams provides a matter-of-fact account of what happens in the painting, while Auden connects the painting to the overall idea of suffering.
There are many kinds (can't name them all off the top of my head)
1. Telling someone you'll keep it a secret and then tell anyway...
2. Always being there for someone and then not
3. When you cheat on your husband/wife or someone you're in a relationship with
4. Using someone just to get some
Those are all I can think of (at the moment). But you can just pick whichever one you want.