Treat
"Vampires. Nobody believes in vampires, so you see, you can't be right about your little theory."
The mask that his friend put on looked crooked. He adjusted it.
"Fine. You have a point. Still, you're wrong."
"What if someone wears the wrong thing?"
"Can't happen."
His friend's mask was a half mask. It only covered the top half. It was an old, green monster. She looked somewhat like The Creature From the Black Lagoon. The rest of her face was painted. She raised her flippers--she was supposed to look fully like The Creature From the Black Lagoon-- and handed him the invite.
They walked to the party. He was dressed as some rich guy with a top hat. His friend, Lagoonia, didn't ask what or who he was supposed to be.
While walking, Rich Guy, told of the old, true story of Halloween.
"You don't have to get dressed up, but..." he said.
The "but" meant that you didn't have a chance against the spirits that could see you, and therefore, posses you.
"Besides, " he went on, "It's not just vampires. Monsters, witches, fairies--none are real."
"Costumes mean something," Lagoonia said disappointedly. Her sad tone, however, was soon to tell Rich Guy that what might have started Halloween didn't take away from her "theory" one bit.