Oh yeah, he's heard that one before. It gets another soft laugh.

"Maybe not right now. But if you stay up, you'll be tired tomorrow, and then you might miss the stars. They could be even better tomorrow than they were tonight."

It's a mild warning, but it's one he's had to live by since his... death. Though, he remembers, sleep didn't always come as easily as things in his situation. Which is why he says, "But, if you're having trouble, I can tell you a trick."