That's possible, maybe more like text-activated?
And I think it could be a little different from the infinite money code analogy in that the game may require events to happen in a certain order. Though it's a little unrelated, using the emotion modifiers to get emotions works, but the game will freeze if you talk to Shrunk for the first time and he wants to give you the Blush emotion.
Anyway, I've restarted, so I'll let you know if the codes work.
Edit: So far, it looks like you were right, Demonic. The codes that were working still work, and the few that don't still don't work.