"Oh! I get it!" He brightens and nods, glad to see they're on the same page. "Ha, sorry, most people say the opposite, so I thought you were, too. But you're right! I don't know why. I've asked about it, but..." He shrugs. "Could be a legal thing. Or they don't want it to make the students nervous. They'll think, 'wow, it must be scary here, the guards have guns!""