It’s just one of the few days a year when societal expectations about how you should dress are loosened.

I guess. Again, it’s a bit more the transparant closeted, partaking in the activity but not partaking in it kinda thing. Like, I saw this at university, and it’s just “ok, you put on a dress… and?”. It’s not “I’m Morrigan from Darkstalkers!” its “I have this cheap dress on”.