“Also, who does he wank to, now?” Jack said.

“Exactly.”

“What a nightmare.”

Ah, for the days when this was Jack's idea of an existential dilemma!

Srsly, though, we all miss the Jack we met in DW1 (whatever we have gained since), and these glimpses of his earlier rascally self are all the more precious for that. What a great premise, and perfect build-up to the punchline.