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The "O-ring Theory"
Could the use of O-rings create a "Rigid band" to keep the foreskin forwards over the glans ?
After almost 2 years with erect coverage I strongly believe that the use of O rings over time created a "bottle neck" to the skin.  Tthis "band" helps keep my foreksin over my glans when erect.
I personally use the 3/4 inch size but others may want to experiment with different sizes to see what fits best for themselves.
 It is my personal opinion that a person needs to have enough skin so that technically there is enough to cover the glans in the first place for this band to be created.  Agian this is just my opinion.
One:  I believe that after the skin gets stressed by a restoring method the skin starts repairing itself. During this period of repair and growth the skin that in under the O-ring is kept in a much more smaller diameter then normal. This may constrict or distort the skin under the O-ring over time creating a " bottle neck " in this area.
There could be three things at play here.
With the O-ring removed I can roll back the foreskin to the point where you can see the "band" at the very end of my foreskin.
Now keep your eye on the band as I move the skin further down the shaft.
Its pretty clear the "band" is smaller in diameter then the penis shaft.
You can clearly see this band that is the end of my foreskin as hold the foreskin back.
This is the best visual proof of what has been going on with my foreskin just by using an O-ring to retain with.

So, To clear things up. This is not caused by an injury. Any injury I had to my skin has local (meaning I had damaged my skin in small areas ) I do not think this could have done this from an injury especially since this started over a month before I injured my skin by getting to aggressive with a the manual stretch exercise I was doing.

Now, what I am about to discuss may sound out there but after close to two years of trying to understand this "band" development I truly can not find any other reason on how and why this has occurred.  This is my own personal view on what is going on and you may have your opinion.  The best I can do is share any information I have.
After two years without usign the O-ring the band is still there and still works as a way to keep my glans covered .
Two: During this time I was using the O-ring when I was sleeping. It is possible that nocturnal erections caused a lot of stress to the skin being bottle necked by the O-ring. This extra stress in a small concentrated area might have produced "Scar tissue"  that formed this band. 
Three: it is possible that the skin is also getting a "urine burn" from urine that is trapped in the wrinkles of skin from the O-ring. This is a possibility since this band of skin is different in texture. The skin feels a little rough and bumpy just in this this band of skin that you will see in the photos bellow.
This would be on the inner side of the foreskin when the skin is over the glans
This is what the O-ring looks like when I wore it. I always had it in the same spot. I used O-ring as a way to Retain for a long time and never had any band develop. It wasn't until 2016 when I was using it during sleeping that this band start to develop. 
This would be me pulling the skin down over the O-ring. I want to stress a point here. The O-ring does not come in direct contact with the skin that has this " band ".
I am using a white circle to represent where this band is located when the O-ring is in place.
I have ruled out my skin having a chemical reaction to the O-ring since the skin that comes in direct contact with the O-ring does not have this " band ".
This is about as far as I can go with out taking the O-ring off. I hope this will clear up any confusion about where this band formed.  Its on the inner side of the foreskin.
I would love to know if anyone else has experienced this.
Revised ( new info ) Jan 8 2019