Being pleasant and at ease in talking to others.
Poverty is not a vice, my friend, but we know you go off like powder, you can't bear a slight, I daresay you took offence at something and went too far yourself," continued Nikodim Fomitch, turning affably to Raskolnikov. "But you were wrong there; he is a capital fellow, I assure you, but explosive, explosive! . . . "
From Dostoevsky's Crime and Punishment.