Obsessive Compulsive Disorder (OCD)

[Madame Adequate]

Occasionally, I have to rub my fingers over surfaces in what I consider balanced patterns.

So if I run my finger over the cover of a book for example, and it starts like this.

Up, Down.

Then I have to proceed with;

Down, Up
Down, Up
Up, Down

I don't know why, and it's not all the time.

EDIT: So yes, sometimes it looks like I'm trying to input the smurfing Contra code on a book or magazine. Damn analog video games.

Yeah I used to be like this too, fortunately it has faded away as I grew older.

It was pretty bad at one point because I didn't finish where you did. This is what mine looked like at it's worst;

Up, Down, Down, Up, Down, Up, Up, Down,
Down, Up, Up, Down, Up, Down, Down, Up,
Down, Up, Up, Down, Up, Down, Down, Up,
Up, Down, Down, Up, Down, Up, Up, Down,
Down, Up, Up, Down, Up, Down, Down, Up,
Up, Down, Down, Up, Down, Up, Up, Down,
Up, Down, Down, Up, Down, Up, Up, Down,
Down, Up, Up, Down, Up, Down, Down, Up,
Down, Up, Up, Down, Up, Down, Down, Up,
Up, Down, Down, Up, Down, Up, Up, Down,
Up, Down, Down, Up, Down, Up, Up, Down,
Down, Up, Up, Down, Up, Down, Down, Up,
Up, Down, Down, Up, Down, Up, Up, Down,
Down, Up, Up, Down, Up, Down, Down, Up,
Down, Up, Up, Down, Up, Down, Down, Up,
Up, Down, Down, Up, Down, Up, Up, Down.

(Though it was always with left and right instead of up and down.)