Yesterday while doing PE expiermentation using the concept of wrapping for girth, clamping, and cock rings (which are all very similer concepts IMO), I came across a cool trick where if you wrap pretty tightly with a elastic stretchy material like the elastic band around the top of some boxers you can keep your erection really stiff and stronger as the blood pools in to the area above the wrap where the head and upper shaft are AND the thing I also noticed that is relavent to this topic is if I left the wrap on and built up a big erection by physcially and mentally stimulating myself I notcied the inner penis under the balls in the taint area for some reason had really blew up and was greatly hard and expanded.
Judging by all my expierence in PE I believe if one were to use this technique for a while then alot of LF’s (Limiting Factors) in the inner would be broken and thus bigger girth and more blood flow would occur if someone did a technique like this more. When it comes to wrapping for girth, clamping and cock rings, I’m still a newb but I can see how these techniques can have so many different applications in peoples PE situtations for everyday PE. The only thing I worry about is how long to keep the wrap with my super hard erection on and how are the blood flow channels working, is there to much inflow of blood and not enough outflow, will this cause vascular damage to the balls area if done wrong? Just have to keep researching I guess. I know I’ll get it soon… :)
Look into concepts and techniques for PE inches-au, I think they could really help. Also like mgus said try some BTB jelqing and probaly some kegels as well but don’t overdo them. They could probaly have you with girthing up your inner penis over time.