I’m in grad school now for psychology and counseling. One of my professors told the story of a former client who was severely depressed, but had no suicidal ideation. His brother and father both committed suicide and he refused to do that to his family. However, he constantly imagined killing his wife. They had a happy marriage, never fought, etc. She was so compassionate and comforting, knowing his mental state. But he couldn’t stop thinking about killing her. My professor made him talk through the act of killing her..closing his eyes and describe every detail and he said the guy just broke down and sobbed uncontrollably. He felt so horrible..he knew it was so wrong and truly didn’t want to hurt her, but he couldn’t stop his thoughts. He was diagnosed (along with 3 or 4 other disorders) with OCD because he was obsessed with the thought of killing his wife. This story sticks with me since I always thought of OCD as people who are obsessed with certain actions, etc..not thoughts or ideas.