This almost seems redundant...almost. I guess I usually think of the word "situation" as being inherently pregnant with an assumed "presence" or "place" and that it wouldn't be necessary to indicate a situation's existence or appearance. I think this reveals Bitzer's conceptualization of situation as not only mobile (in that a "situation" can be present or absent) but also conditional.

This references the painful side of sexuality. In the wasteland, there is no love.