For all that Jack's smiles come easily and completely devoid of sincerity, he can appreciate the subtler variety.

"Aside from your fortune, your firstborn, and your immortal soul? I hadn't decided." Which, teasing aside, he realizes is not the most comforting answer, but he has the upper hand in this particular exchange; he doesn't have to be comforting. Out of respect for Lex's intelligence, though, he can be reasonably straightforward. "I'm a politician, Mr. Luther, it suits me to have friends in a variety of places."

Friends who owe him favors, doubly so. He figures Lex can put that much together himself.