The OCD comes from this part of the brain called the corticostriatal thalamic circuit. This thing forms a circuit that governs attention with action and reward. Once I have these obsessional thoughts, once I have all these negative thoughts, let's say they're like kind of forbidden sexual thoughts or something like that, I don't want them, they're intrusive, they're distracting me from studying. And I feel bad about myself for having them. So if we kind of look at what's going on in the brain here, we have a particular amount of mental distress. Our brain learns that in order to relieve the mental distress, what I have to do is engage in the