Suicide without warning? The strange door number 1 or 2 on the "subway"? A man wearing a pair of old leather shoes? Is all this "real"? Or is it obsession? Forget it, it's better to just wander around and enjoy yourself now that we're here, or try to meet those people we "never see again". Perhaps, as we take things as they come, the so-called "truth" will come quietly.
Idea: Maybe we are all so lucky to meet again people we will never see again. If we are not so lucky, then we should also understand that it is a never-ending obsession.