A kind of a naive answer
Hi Tosma
That is an excellent question and I try to answer it with some basic ideas I have. I hope more expert folks in here may join the discussion and correct me.
Girth work is always focused on the tunica. You can try to build pressure from the inside (clamping etc) or from the outside (pumping).
Pressure from the inside should, if I remember hydrodynamics, be easier to build. Blood flows from the arteries into the CC and CS, you mechanically block the veins and then apply pressure to other parts of CC and CS. Result: pressure rises from the inside and expands the tunica, creating micro-fissures which then heal in an elongated state. It’s risky, yes, veins may pop, CC or CS may pop too. That’s why it’s considered to be an advanced technique requiring a lot of PE knowledge about your very individual dick. But if you get positive results, they should be on the rather permanent side.
Pumping is a bit different. The penis is not like a simple garden hose where there is only one tubular layer to work on. The tunica is the inner tube, CC and CS again have tubular walls and the skin being the outer tube. The pressure is built through vacuum on the outer tube only. Now what happens? Naturally the inner tube can and will expand. The penis gets bigger indeed, but the tunica is not as much affected, and the CC and CS tubular surfaces even less, it’s maainky affectung the skin being the outer tube. But as well you may have some lymphatic fluid that can flow between tunica and skin ior between CC/CS and the tunica. Simply speaking you will have “water” between the variois inner tubes and the outer tube. Finding the equilibrium between vacuum intensity, duration and frequency in order to avoid this is not trivial. And again, injuries can happen too because again veins and even CC and CS may start to leak. For this reasons, again, pumping is considered as advanced technique. And as far as I understand it, transforming the short term expansion from pumping sessions into sustainable gains is not a trivial thing unless you wear a lifetime cockring. But that would be clamping again…
If you would ask me which of the two I would prefer my sincere answer is “some very light pumping alternating with some serious manual girth exercises”. I think, as far as I can understand penis anatomy, that the natural construction can handle heavy inside pressure a wee bit better than vacuum from the outside. The penis is naturally built to resist quite some stress from wrong angles, tight orifices, overgreedy masturbation etc etc which is all taken by the clever construction of blood filled containers and the stable tunica. Vacuum was not that much planned by evolution I guess, but the ease and quickness if expansion is always tempting. Pumping seems to be easy but it’s not, manual girth work seems to be risky and complicated and, yes!, it is.
I hope you can get something useful out of this.
Happy gaining!
Richard65
Modified forum rule #69: Your avatar must show a JUICY ass, may it be female, male, mermaid, even sheep or horses are accepted. :-)
My logbook: Richard65 - the roadbook