A friend of mine wants to stop smoking.  This made me wonder—where does the urge to smoke go in the model?  I can think of instances when it could be a C, T, and F and all make sense in a way and I’m not sure which is correct.

C: Urge to smoke exists
T: It’s okay that I feel the urge. I don’t have to act on it
F: Calm
(etc.)

C: Friends are drinking
T: I want to drink with them. (urge)
F: Frustration
(etc.)

C: Friends are drinking
T: I want to drink with them.
F: Urge to drink
(etc.)