See, this is already one of the main differences. There's no school, let alone school dances! So the idea of there being some sort of school (?) dance (?) where people dance that intimately (???) is enough to blow Inigo's mind.

But he at least does bother to ask the question, despite all the question marks appearing in his own head.

"I don't know.." Well, he does know what they're like, but he doesn't even know where to start to describe the differences when dancing in Prompto's world is so.. so!! You know!

"It's not as if it's uncommon to dance together, but it also tends to be more of a solo thing. Most of my mother's dances were like that."