That's the strange part! They're not! They are often mass-produced, which is how someone can have an identical dress in the first place! I suppose there's the fact that they're sometimes expensive, and it's common for the events to be proms, which I'll explain in a moment, but it's so senseless!

Proms are events held in a country called America, where all of the students of a high school dress up in fancy clothing and go to dance. I'm told it's a very important-seeming thing at the time, but even a couple years later you don't really care all that much. ++