One of the interesting things about the OCD/repetitive-thinking loop in people's brains is that the more they go through the loop, the more it reinforces that repetitive thinking pattern and the neurochemistry that supports it. So breaking the trend and stepping outside of that repetitive-thinking/obsessive loop is one of the deliberate actions that helps not reinforce that loop. The more people allow their brains to do that, the easier it is to fall into that pattern. The more people don't allow themselves to cycle through that loop, the easier it is not to get stuck in that pattern.

We learned about this in medical psychopathology class.