there was a tlc maybe show i remember one particular episode of whatever show this was where a woman had harm ocd where she wouldnt even touch knives because of how terrified of her thoughts she was but the therapist actually did erp with her starting just with being in close proximity with knives all the way up to the having her hold a knife to the therapists throat if i am remembering correctly anyways that was kind of the first experience i had with understanding intrusive thoughts i also remember an episode with compulsions being shown i wish i could remember the name   edit found it its called obsessed