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Sleeve Pumping Theory

Making the case for the benefits of sleeve pumping - Theory

Brothers, I’ve been kicking around a theory regarding the use of sleeves while pumping and wondering if anyone could offer any medical perspective to see if my thoughts on the matter hold any water. Its been debated that the negative pressure of a pump works mostly on the subcutaneous veins and tissue exterior to the CC, leaving very little impact on the tunica and CC themselves.

To quote another member here “At maximum erection with a very rock hard tunica, pumping at pressures not exceeding medically recommended levels (200 - 250 mmHg, 270 - 340 cmH2O, 7.9 - 9.8 inHg) would have minimal effect [on CC expansion.] You will not be able to elevate the tunica to increase blood volume in the cavernosa as the pressure will still be above arterial pressure (unless you’ve got untreated very high blood pressure). I see pumping only effect at this degree of erections to be on the tissue under the skin and over the tunica (subcutaneous tissue) filled with very loose connective tissue.”

If I’m understanding correctly, the member seems to propose that entering the tube with an erection may infact be counter productive due to the arterial blood flow of the subcutaneous tissue being higher than that of the CC, thus preventing additional blood volume from entering the CC adequately enough to cause the needed tunica distension to realize gains. So in effect, based on this reasoning, it would seem going in flaccid may have a more positive effect on tunica distension which is counter to what I see recommended around here quite often, going in with a full erection.

My theory based around this concept would be to use a tightly fitting silicone compression sleeve like the medium hardness Silisleeve from MOS, one that will still stretch in the tube but maybe a little too tight to use outside the tube, as this would create a positive pressure on the subcutaneous blood volume forcing more blood to enter the CC. So while it may seem counter-intuitive to use compression on a girth exercise, if it causes more blood to divert to the CC where we are looking for maximal expansion to take place, which is what makes the case for clamping, there could be some benefit. It has also been my experience that I have gained more girth at my base where I have used more compression, like a cockring, despite doing jelqs which force blood up the shaft and start with compression at the base. I’m not sure if that is a common experience though but I have seen others that have made this observation also. If that is the case, this compression theory could potentially be the reason why. I am no biology major, so I may be totally off base, which is why I’m asking if there are any members with a medical background that could add credence to the theory.


Start date: 10/06/2021, NBPEL: 6in, MEG: 5in

UPDATE: 11/28/2021, NPBEL: 6.5in, MEG:5.25


Last edited by djvynz : 11-25-2021 at .

I hope you get responses to your theory. I’m curious of this also.

I must ask though, how in the fuck did you gain .25” in MEG in a month?


Start 8/15/18-BPEL-6.75” MEG-4.625”

2/17/20-BPEL-7.125” MEG-5”

Goal- 8”x5.5”

Originally Posted by Lookinforgirth
I hope you get responses to your theory. I’m curious of this also.
I must ask though, how in the fuck did you gain .25” in MEG in a month?

To be honest, I’m not really sure.lol. My gains seemed to come out of nowhere, I posted about this elsewhere on here because I wasn’t sure if it was common. I was going pretty balls to the wall with my Phallosan for the first month, like 7 to 9 hours a day, 6 days a week. I’d switch between the Forte and the Plus on different days, and sometimes would do a hybrid and then use my BM every other day doing a 5x5x3 method. Some light manual stretches to warm up in the morning, only about 10 min and light jelqing which was somewhat inconsistent. I was so new, I really didn’t know what I was doing, I just did what the manuals recommended. And then I came across MOS forums about 3 weeks in and everyone was talking about using heat, so I bought a Sunbeam Flexfit heat wrap and started using that throughout my entire routine, for all 7-8 hours. After about a week of using all day heat, I measured again and I gained about .25 MEG and .25 NBPEL. This was after seeing no gains whatsoever for weeks, maybe only a mm or 2 +/- but I wrote that off as margin of error. I really didn’t believe what I was seeing and was pretty gobsmacked that PE actually worked. The downside is, shortly after I started experiencing severe EQ decline and negative PIs. Like my little guy would just lay there no matter how I tried to stimulate him. I also started to get numbness in my perineum like from riding a narrow bike seat too long and some sharp stabbing pin-like sensations in my unit around my urethra that would last most of the day. No morning wood whatsoever. I got pretty scared that I fucked myself up good and took 2 weeks off. Fortunately my EQ has come back and most of the negative PI went away. I gingerly tried to step back into stretching but after a few day using ADS, I started getting the pin sensations in my urethra back so I’ve been laying off the stretching and just been pumping for the time being. My theory is, the all day heat caused too much plasticity and my tissues stretched faster than my nerve could compensate for and since nerve isn’t very elastic, I stretched the nerve too quickly which led to all the negative effects. I looked it up and nerve will become damaged if it stretches beyond 6% and severe damage if 15% or more. Fortunately I didn’t get into that higher range, but I learned my lesson not to use so much tension while under constant heat. But that’s it really. Some of it maybe due to strictly improved EQ, but even after the 2 weeks layoff, the gains didn’t diminish. In fact when I’m having great EQ, I’m closer to 6.5 NBPEL, but girth is still about 5.25 MEG, my base is like 5.75 though, which I hope will gradually move up the shaft. I may just be an easy gainer, but I honestly think the all day heat is the factor. Just be careful with it if you choose to do ADH and go lighter on the tension than you would do cold so you don’t end up over stretching the nerves. Learn from my “I’m about to go jump off a cliff” moment. LOL


Start date: 10/06/2021, NBPEL: 6in, MEG: 5in

UPDATE: 11/28/2021, NPBEL: 6.5in, MEG:5.25

One other factor that leads me to believe there was some rapid plasticity is, I seem to have developed some stretch marks right below my circumcision scar. The skin appears kind of shiny and thinner in a couple spots. I also seem to have developed a slight baseball bat shape right in the same area. I’m not sure if it’s due to some scar tissue that developed or if it’s just due to the girthier gain below midshaft that makes it appear that way, but it’s right where the tension would have been the highest while wearing the vacuum cup, right under the glans. I also seem to twist a little more to the left while flaccid, which is why I’m wondering if it’s scar tissue or if it’s always been that way and I’m just noticing it more since I’m now paying more attention to my unit. Everything looks normal when I have a hard-on, but has me wondering if anyone else has experienced developing a baseball bat shape in their flaccid at the tension point right below the glans.


Start date: 10/06/2021, NBPEL: 6in, MEG: 5in

UPDATE: 11/28/2021, NPBEL: 6.5in, MEG:5.25


Last edited by djvynz : 11-25-2021 at .
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