"You don't." It was, in the end, the problem with being a guidance-y leader-y type of person. Where did duty end and the rest of life begin? While David himself might know, it was hardly the sort of thing that could be put on powerpoint for the benefit of all.
"On the other hand," David cocked his head at Arla, catching her eye. "I'm not exactly on duty now. I'm pretty sure this violates some sort of professional dress code." Cheap laughs, but hey, he'd work with what he could. "I took this job here because I'm the rare kind of sap who actually does like to make people feel good about themselves, as pathetic as that seems to be. Some people say I'm good at it, some people ... want to hit me."
He paused for a moment, floating silently as he took the question further. Finally, he offered the best shrug he could under the circumstances. "Even if you weren't a Morlock with a wonderful hidden sense of humor, you're willing to talk to me without expecting miracles back. That ... means a lot." A small smile, as David looked away.