Why is it baffling? She told him when he wouldn't shake that she wouldn't bite.This is already covered in another thread (and the topic title here is baffling — bite him?), so will merge into the existing coverage.
BTW, what thread was this covered in so I can review the comments? The rules on this forum for starting new threads are a little baffling for a newbie like me. Don't mean to intrude on established traditions, but........when topics get hundreds of posts that go in many side directions, it can be hard to spot something that's already been covered.