i do those too! not alone!! ever since i was 8 years old, i still do those i check corners. re check corners if something isn't touched the right way it needs to be retouched till it feels right.....hey did you know that any number any number spell it out than count it it will always end up to 4 so say like 24=10=ten=3=three=5=five=4...any number will always be 4 yeah try having that being stuck in your head all the time thats my number counting fun actually i turned it into an anxiety releaser it calms me and focuses me i had a bunch of tics growing up shaking my head and continous blinking. over the years i have found my number obsession to be my safety blanket (does that sound weird) and cut most everything out (although i can't take credit to everything i'm sure part of it my med is helping with too)