Structure & Function

I tried to get Male2Shred (my bottom) to pose for a similar picture, but, oddly, he refused.  Note to self: negotiate before getting out chain-saw. 

Fortunately, Wikimedia Commons had the above illustration, which was created by user "Tsaitgaist" and is subject to the Creative Commons Attribution ShareAlike 3.0 License. 

Unless you're a real-life nun, you probably have a pretty good grasp on male anatomy.  Given that you're reading this website, that grasp is probably also firm.  Very firm.  But the diagram may still help us talk about some of the finer points.  For those who have ADHD, otherwise find this material too dry, or my sense of humor too corny, feel free to skip down to the "Opportunities", "Vulnerabilities" and "Implications  sections below.

The male urogenital system is absurdly, but brilliantly, designed -- both for its original purposes, and for ours.  Let's use the same path that the sperm uses to go through themale reproductive system, a water ride through long, dark, narrow tubes.  If I were better at web design, you'd be hearing an endless loop of "Its a Small World After All" playing from your speakers.  I'm not, so you won't.

As we all know, young sperm are manufactured in the testes by little elves toiling away at long, narrow, twisty conveyor belts ... well, not quite, but close.  Each testicle is composed of a number of "lobes" -- essentially little chambers -- with each chamber holding a long convoluted tube in which spermatazoa are created and moved towards "the exit" by tiny hair like structures in the tubes.  And, eventually, the spermatazoa reach the epididymus -- a sort of boarding school for young sperm where they live while they mature

Opportunities

• Qualitative differences -- radiating ache extending to abdomen vs sting vs thud
• Key sensitive spots (corona of glans and ridged band of foreskin) to pressure, testicles to percussion, scrotum and frenum to sting,   

Testicles:

Vulnerabilities:  You often hear that testicles are well protected, tough and resilient, and to some extent each of these is true. But note the emphasis on "to some extent".  The testicles themselves are reasonably tough, and well designed to get out of the way of any impact, but a number of structures in that area are not so tough or "agile". 

Implications

• Start Low and Slow.  Because of their exquisite sensitivity, the testicles probably have a higher "sensitivity to fragility ratio" (SFR, pronounced "Suffer") than any other part of a man.  There are other schools of thought, however, which we will get to later.  If I start low and build intensity slowly, it makes it more likely that I hit my bottom's pain limit before breaking anything vital.  Working in the other direction -- starting with maximum force and working down to find a point that does not do additional damage -- may be more satisfying in the short run, but has other, evident, long term drawbacks.

• Répétez S'il Vous Plait.  More than most areas, pain "builds" in the testes.  Repeatedly and rapidly strike your wrist with a pencil, and each strike hurts about the same.  Repeatedly and rapidly strike a pair of balls, and there will be quite a build up in pain.