"Because it can clear my senses. The pain. The... screaming sing of the metal. It drowns other urges. I've since found that even I am susceptible to the magics of this world. During the... fracas of before, I harmed those who were also affected." Granted, they'd been about to harm people he knew, but he had learned control over the years. He would have normally tried to talk a man down, not bitten his neck and feasted because he'd drawn a sword on a woman he knew.

"If I am to be in your company, and you in mine, I would offer you a means to protect yourself should I lose control. I am a monster, Lady. Or, I can be. Every day, I crave what I refuse myself. And should you be around me when that control breaks, I would never be able to forgive myself if harm came your way. So keep something on you, for my sake. A ring. A necklace. A handful of coin. Knowing you have some protection will bring me a small bit of peace."