OCD

Or whatever you call it. You ever had that thing where you are doing one thing, and you think of another thing. The other thing doesn't have to be done then. Or soon. But now you've had the thought. And you HAVE to do it.

Like crossing a road. I have to cross the road at some point I know. But I could walk a ways before it's necessary. But once I've had the thought, I have to wait and cross, even if there's traffic. I could just walk straight till the crossing is mandatory. But that feels like I was forced into it :). So I cross when I think about crossing.

See. OCD. Or whatever.