Marco's smile stayed small as Oliver explained. He shook his head. "No, no, I like it. You're the only one who's allowed to call me that, though, okay? Like, um, like Juno calling me Stitch. It's not the same if someone else does it." Hearing it out loud, he couldn't help but feel like that was corny and pointless, but he didn't change his mind on the matter. He wished that he had found another onesie, something big for Oliver, but the thought of Oliver actually wearing a onesie just made him laugh, and he didn't bother to explain why he was laughing to Oliver.
A dinosaur onesie would have been cool. Or a cow.
"So," he said after a moment, "um, I'm really scared," he admitted. "I just... I'm really scared. Are you scared? I don't know why you'd be scared. I'm scared, though."