In my purse I have a small bar of soap. I keep it there in case anything bad ever happend, because few things make me feel better and more capable than being clean. But then I thought, "What could ever happen that would be so bad I wouldn't have access to soap?" Naturally, the apocalypse. But then I realized, if the apocalypse happens, noone will care what I smell like. Thus it is ironic apocalypse soap. The soap is ironic, not the apocalypse.
(P.s. Roots: I intended to post a comment replying to your last comment, but after 7 tries, couldn't get it, I decided to wait until I had access to a computor. I'm not sure how long that will be...)