All sorts of things. How to share your memories, or blend in with the locals, or to be able to communicate even when you're asleep. How to talk to someone on walkabout when you're on the jaunt, or the other way around. How to bring people back to themselves when they're infiltrating, or how to stay yourself even when you're infiltrating. And a bunch more too.

[A bunch more that he probably won't be sharing with her, as much of it is less innocuous and benign.]