"So long as you do no harm to another, change your opinion once in a while. Contradict yourself without being embarrassed. This is your right. It doesn't matter what others think -because that's what they will think, in any case."

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Hidan: Hey, look at that, it's my headband! You went to the trouble of picking it up and keeping for me? I'm touched. You're a pretty nice guy, Kakuzu, you knwo that? Kakuzu: Shut up. Let's go. Hidan: Let me put it on at least! Okay, I'm coming. Admit it, you like me a little, doncha? Kakuzu: Either you shut up, or I'll kill you. Hidan: Haha, you're embarrassed! I understand.

— Masashi Kishimoto