It happened for the first time today.
I was going through some old boxes from Eden on one of the days that Lucius was home from service. Amongst one was an old medical kit of mine that I start to go through to assess usefulness of the materials. As I was pulling out a stapler, Lucius walks in. As he sees the stapler he says, "Ah, you back to flirting again?" I just kind of stared at him for a minute before shrugging and turning away.