Weird

He noticed the mark on his arm around 9:46 AM.  That was the first time.  It looked as if he had just donated blood.  He hadn't.  It wasn't there yesterday either, he was certain of that.  He had worn a polo and would have noticed.  He supposed it had happened in the night, while he slept.  Somewhere, far off in space an alien spaceship was now carrying with them a vial of his blood.  Human DNA traveling across the galaxy.  That's weird.  He didn't even feel it.