[Jack grins at the evidence he's hit a nerve, but it's useful information too. The era people grow up in always informs who they become to a certain extent.
He gives Spike another appraising look when he reveals how old he is. He can't help wondering what John would say if he knew he had an immortal doppelganger.]
Looking good for someone over a century old.
[Oh yeah, Whedonverse ages are such fun. "Not yet 200" to 120-something. Great continuity! *g*]