He looks at her face and nods, briefly. Whatever her reason, it must be big. "Is it radioactive?"

The words are only partly a joke. Howard, of all people, knows that kind of danger, and he knows she knows it too. He built the bomb for a reason, and not a good one, not for girls like Tosh. "I don't have any reason to, and last I checked, guys like me didn't go around wearing necklaces."