The Penis has 3 main points of attachment inside. 2x crus penis and the bulb penis.
If you manage to stretch the penis from these attachment points towards “outside” then it reacts.
There is no reason why stretching out from these attachment points there shouldnt be a possiblity to stretch and lengthen that tissue like other tissue (Shifting is probably the wrong word.)
Its living tissue and not cement and gorilla glue how the penis is attached inside.
Just look at the picture above. 3 attachment points that can be “attacked” by relaxing the muscles BC and IC while stretching.(there are better ones one can find with a g-image search)
If you engage the IC muscle while stretching you can clearly feel a resistance INSIDE which is biggest stretching out to the left/right. If you hit it right, while relaxing the muscles, you are clearly hitting one of the two crus penis attachment points.
I understand what you mean with the arabic jelq tease and I have no prob naming things head on.
If DLD finds something(or anyone else) ,with his overpriced tools he has a share in, then it is how it is. He found that you can attack the inner penis, in this case more the bulb penis, with pulling the bathmate up and out while fully pumped. It clearly targets the inner penis and stretches it as when you overdo it you get a sore feeling that is similar to hanging soreness in the ligs but clearly located INSIDE..
Of course I can see how most people get a brain cramp reading DLD and bathmate lol but thats your prob locking yourself out from finding something because you dont like the mug of the one who presents it. For anyone interested - Bathmate Hardcore stretches is the exercise.(but very advanced and discoloration guarenteed) Its basicly erect stretches in a pumped state..which is of course insane.,, but it impacts inner penis in a very clear and distinct way if people like it or not.
I dont own an air pump but maybe its possible to stretch the tube and penis there too out and into different directions. But the circumferential uniform grip of the water is making it easier I guess to accomplish that without loosing grip at the base.
About IC muscle getting outside is reported more then once in BIBs hanging forum(for example by RB who is a member here too I think). And if one looks at anatomical pictures of the IC muscle and how it is attached to the CC and crus penis then its clear that it is possible to be stretched outside. I train my IC muscle isolated and while I couldnt find it starting out cramping int omy groin I can now feel it contracting nearer to the “surface”/outside.
The inner penis feels wider and this has two reasons. For reference one has to look at anatomcial pictures who show it.
-There is more “stuff” inside attached to it like the biggests parts of the IC and BC muscles.
-The Penis gets divided sort of to be attached to the 3 main attachment points. CRUS PENIS and BULB Penis thus widening the room it takes.
The ligs act as a stopper to stretches attempting to take the inner penis out. If one cuts his ligs and attempts Bathmate stretches it will stretch/”attack” inner Penis more easy then with tight ligs as all the pull will be focused onto the inenr penis attachment points. Of course the inner penis has more resisting points but its also tissue that can be stretched.
BIBs LOT theory, which in its first version is totaly discredited on here but has evolved further on his forums, explains these relations in parts too.
Again, not saying its the only reason for base girth gains.. they interact in various degres I suppose depending on individual anatomy and the way we attack the tissue.