It wasn't like Keith wasn't used to people making assumptions about him because of how he looked. He barely noticed it anymore, actually. It did register, but not as anything really important. He simply nodded quietly in response to the other man's somewhat strange tone of voice, then adjusted the books he carried more solidly in his arms.
"...How did you know that I am a witch?" That wasn't something that he'd told very many people, and his gaze turned somewhere between suspicious and curious. "Yes, I'm a healer, but I want to learn medicine to supplement my powers, so I can use both ways to help."