This cartoon is, of course, a parody of the final scene in the movie Casablanca. The first line in the cartoon is a direct quote from the movie. The rest is my own invention.
In retrospect, I should have made the female character in this cartoon look and dress more like Ingrid Bergman's character in the film. (I did a fair job of this with the male; or at least, he's wearing a trenchcoat like Humphrey Bogart did.) But the punchline still works, nonetheless.