"Concupiscence," Spencer said, squirming a little, then going still. "That's the word. ...I don't know what else I can tell you about it. Thomas Aquinas in the 13th century described two divisions of "sensuality": the concupiscible, and the irascible. The former associated with the emotions of joy and sadness, love and hate, desire and repugnance- And the latter with daring and fear, hope and despair, even anger."