You could always ask your mother or father, I'm sure they would know if you had a brother or not.
Who is your Brother and, if you do not already know, how can one go about finding out the answer? (I assume that one can find out by asking, but who is there to ask?) If you cannot find out, at the very least, how would you define it?
My OCD is nonexistent.
I have to admit I have some .. But it can be a good thing too. It has helped me stay ahead of situations many times.