If your f/o lives in another time period/universe, how would they react to our world (in the period that we live in)?
I imagine my f/o freaking out with screens and electronics. He'll flinch whenever a gadget opens, or when a digital clock changes numbers. He would be unfamiliar with forks because he's only accustomed to using hands, knives, and spoons. He would be fascinated by the idea of vehicles, but would feel dizzy and nauseous the first time he rides them. He would also be scared and overwhelmed by how fast the vehicles move.
When visiting cities, tall skyscrapers might freak him out.
He might think of the planes as just another flying object controlled by an invisible force, only to be shocked that people are riding in that "little" thing. Because of the ongoing climate change, he might feel hot and sweaty most of the time except during winters and in the region where his country is from. He might be pleased by the fact that the country he's from and the countries in the same region were the most developed nations worldwide.
When it comes to music, he might find them weird at first but gets fascinated by them eventually. He might perhaps recognize some words from the songs I listen to, since l listen to songs in the language of his country (and nearby countries).