Thoughts are disposable, yes? The brain spits out garbage all day long. Strange impulses. Bizarre fantasies. Gross images you don’t go looking for but pop into your mind anyway. Yes?” Speedy chuckles. “Right. It’s completely normal. People with healthy brains just brush the thoughts away. OCD is, essentially, a rupture in that sweeping mechanism. If you suffer from OCD, you can’t brush them away. Your mind gets stuck on them. It obsesses over them.”