Earlier in the year, I came across an online version of an old self-defence manual titled, "Get Tough!" [vrazvedka.ru], which was first published during the second world war. It touts that it includes the same hand-to-hand training that was taught to US' Armed Forces and British Commandos. It is scattered with illustrations of British service men fighting with German Wehrmacht soldiers. At a rough estimate, it appears 99% of moves involve doing something nasty to your opponents testicles.
You are seized by the throat, as in Fig. 21, and forced back against a wall.
With a smashing blow with the edge of your right hand, strike your opponent's right wrist towards your left-hand side. Follow up with a knee kick to his testicles (Fig. 22).
The tag-team version of this manurer is demonstrated by Phil Mitchell and his lady friend, which I looped from a recent Eastenders program thing. Sorry, I'm not an avid viewer, so I haven't a clue what it's really about, but she cracks the guy's balls, and big Phil runs in with a left hook.
And now, a short preview of next week's feature, which is also taken from the "Get Tough!" book: "Making love to the Wehrmacht"....
"Section 1: Foreplay - If possible, bite his ear. Even though not successful, the attempt will cause him to bend forward and into a position from which you can seize his testicles with your right hand."