Using my critical theory skills developed from professor shekelsteins class on postmodern art, I'd say that it means the third man, utilizing his backwards facing shirt, is actually commenting on how the original idea presented by the first two men is a philosophy that must be undone, or that the Jewish girl is actually more likely to rape the others. Furthermore. I would also say that this decision by the artist is a reflection on the critique that we even read things left to right, or even that the concepts of "left" or "right" or merely social constructs and have no place on our minds at all.