With this film, I believe that Hustler is slyly appealing to scat-porn aficionados scattered around the former Axis nations.
Let's look at the boxcover.
Why is Jaymes, of all colors, yellow? She looks like a sexy Philadelphia snowbank in March. Is it because she's been de-briefed? I think this is Hustler's nod to the urine-soaked panties culture that has emerged in Japan since the aftermath of World War II.
Moving on to Germany and further validating the doo-doo subtext, of course, is that this installment of De-Briefed is "# 2".
Where Italy fits in to all this I'm not sure, unless all the underpants girls are riding mopeds.