I am OCD.

I give you OCD thoughts.

(made my a person who has OCD.)

You walk downs at the street before a sudden thought comes to mind

"Walk a perfect 4 circles around that lantarn, OR something REALLY bad happens."

The thought it... It feels so real. You feel a urge to do it, you walk to the lantarn and walks 4 perfect circles around it before it feels like it wasn't right.

"2 more circles and then count till 4."