Every relationship has fights. Some relationships are fairly calm, with only the occasional light spat that is quickly smoothed over. Others have their ups and downs, but conflict handled quickly when it happens--no one likes fighting with a loved one after all. Still more will find work-arounds, lying, cheating, anything to avoid anger and upset because they can't deal with the potential for arguments.
Rarity and Applejack are not any those kinds of people.
For them, arguments and raised voices are just as integral to their relationship as laughter and smiles. They fight and bicker and disagree on everything from fashion to the weather to what movies to watch. Its just part of who they are, and they always work through it in the end.
But never in all of the years they have known each other could Applejack remember fighting over something so small. Or made of such see-through material.
A Rarijack One-shot set in the same universe as Cross the Rubicon, this takes place somewhere before the first Equestria girls movie, but while the girls were in high school. Can be read independently of Rubicon, but is technically part of the slowly growing multitude of side stories and ideas that have taken on a life of their own.