There are several connects that could be made with the short story The Scarlet Ibis when looking at the themes of the text. One of the largest themes is the idea of pride and love, and how they can sometimes conflict with one another. Brother helps Doodle because he is embarassed that he cannot do basic physical activities; of course he loves Doodle, but Brother does not help him for unselfish reasons. An outside connection that could be made is when one helped another person for selfish reasons, though it may have been veiled as kindness or love.
Another theme that could be used to make an outside connection is the idea of being different. Doodle and the scarlet ibis are both very different from what is considered "normal" in their current environment, and those differences eventually lead to their respective deaths. Think about a time when being different was very difficult and led to a sacrifice or other difficulty.