Thanks so much! I was going through some of my episodes a few days ago, and it occurred to me that Martin is a lot more emotional than he'd like to think he is--he feels things very profoundly (especially other people's suffering; he's incredibly empathetic, in that sense), and that frightens him. So, of course, he doesn't communicate his feelings to other people. So, of course, Danny becomes annoyed and has to make him talk :D