I can't say I have OCD, but I do fixate on certain things. I jiggle my door handles 3 times to make sure they are locked. I push my car key fob 3 times to both lock and unlock. If I'm using my oven I push the temp in sequences of 3. If I reach the required temp and I have one or two taps to go...the temp is just going to be 5 or 10 degrees higher...¯\_(ツ)_/¯ there's definitely more, but I'll stop there.