When ad-hominem attacks about the other person's weight fail to connect, one arguer goes to the good old standard "You don't have a life" argument, pointing out the time of night (or amount of time) that the other person is arguing about this stupid subject.
Few human beings being talked to in such a way can resist pointing out the obvious -- the accuser himself is sitting here arguing at 3:30 a.m. as well, and has been doing so for the past five hours as well.
That puts the first person on the defensive, and he has to point out his time zone ("It's afternoon here!") and other mitigating factors ("I'm just killing time until my girlfriend finishes work and comes here for sex!") before reasserting that the other person is, in fact, the pathetic one, and insisting that he feels sorry for them.
