If you've ever heard someone with OCD say, “But I didn’t even do anything, I just thought about it,” you may have witnessed the bewildering reality of mental compulsions, the stealthiest players in the OCD universe. While traditional OCD tends to get all the press with its handwashing and light-switch flipping, mental compulsions are more like the stealthy ninja of the disorder. Read more to understand how mental compulsions present and ways to treat OCD using ERP and ACT.