One aspect that is never discussed is "how much foreskin is needed?" I keep hearing "foreskin or no foreskin", but it's not that simple. It's like saying "teeth or no teeth" or "eyes or no eyes". People do get orthodontic braces to adjust their teeth, and people do get eyeglasses to adjust their eyesight. And we grow hair, and fingernails - should they also be as long as they like because "they're there for a reason"?
I believe people have been cutting off excess foreskins the same way ever since they knew how - because from a certain point onward, it's just too much material, and impedes functionality.
So, if I were asked that question by anyone, my response would be "if it sits behind the glans when erect, and goes there by itself, it's as it should be." That is why I had mine cut off. I hated having skin in the way all the time during sex, and I simply believe nature does not intend it to be there then, either.
So, if it slips back behind the glans when erect, where should it sit when flaccid? I think I have discovered something else that's pretty amazing and nobody talks about: Even though my scar is behind the glans, albeit with fairly loose and wrinkly shaft skin, I can actually pull all that skin forward and close it in front of the glans, where it will then contract, using the ring muscles. And it will stay that way, all day long, giving my thing a look that would leave me undetected as a spy in any Russian sauna. I use this when I go running in cold weather.
Long story short, I think if I can do this with technically no foreskin forward of the corona, imagine how easily someone with a bit more than that would be able to cover the glans to go tree climbing and crawling to ambush yummy djungle beasts in primeval grass. According to my math then, any foreskin which covers more than a third of the glans when flaccid would have to be redundant in length.
And that's where I stand on this.