I know I have seen OCD first hand for many years. My Aunt had OCD and anxiety. She had to have a routine. Her house was immaculent. If things were out of place they had to be put back in order. She had one grocery store she would shop at. One loaf of bread that she liked to buy. If they were out of her bread she couldn't bring herself to purchase the other kind. She had this schedule also. Like Monday was grocery shopping day. Fridays they would go out to eat at one restaurant every week. If my Uncle happened to be sick on a Friday to say go on a Saturday it would throw her whole world off. It just couldn't happen if it didn't fit her routine. She would check things constantly. I mean OCD you didn't just have to sit and try to analyze if there were things that were happening that were consistent. It was so out there and plain to see that the things she did were so out of the ordinary from someone who didn't have this disorder.