"A bite?"

For some reason, Thomas doesn't think Derek just means a gentle nip on the finger either. The fangs he'd seen when Derek had changed looked like they could saw through a shucking tree if it was needed.

"So, if you wanted to, you could bite someone and change them?" That seemed to be how it worked but Thomas's head was such a mess that he could have been reading it all wrong. "If that's how it works, why would you bite someone? Self defense?"