Vampire at the Library

I was instructing a patron on how to access the library catalog and place holds. Throughout our conversation there was something odd about this guy. I mean sure he was nice which is odd. He was clean cut and intelligent which is also not normal for our clientele. In the middle of his conversation it hit me. He's got vampire fangs. Not the insertable kind but the permanent caps. I'd expect this guy to be all goth but no. He looks like an older version of Wally Cleaver. It was a little surreal. I wanted to ask if he was a sanguinarian but thought it might be intrusive.