Cal is acclimating to seeing Luke again, unchanged, after so many years.

And Luke... wants to get to know Cal. Because Cal's lived nearly Luke's entire lifetime, waiting for Luke to catch up to this moment. And he wants to learn about that life, this Cal, who he's grown into.

"Yes. Among other things. I want to know the you who has lived the better part of twenty years. Also, you've been flying for a while and a shower wouldn't go amiss." He gives Cal a cheeky grin.