Roommates in the ward

There are a few crazy girls in my singles ward (who are all roommates). One Sunday they came to church wearing prom dresses. I thought this was weird, but everyone else treated it like it was nothing. Someone else said, "I wish you had told me it was formal day, I would have worn mine."
Then at a family home evening activity, all of these girls sat and held hands with each other, as they listened to the lesson. Again, I thought WEIRD. Everyone else didn't bat an eye.