I appreciate all the good feed-back about foreskins. The one thing I am learning, which I already suspected, is that circumcision is rarely, if ever, necessary. I believe that any foreskin, with the proper exercise, can be stretched enough to retract over the head of the cock.
In my own case, I did not know anything about "retraction" until an older friend pointed out that I would need to stretch the foreskin enough to push it back, in readiness for the time when I would fuck women. So, I did the "exercise" he recommended until I was able to retract the foreskin in a short time. At first it was very tight and painful, but with repeated exercise, it became much easier.
None of the women I have fucked have ever complained about the fact I still have my foreskin. My wife tells me that when we fuck she can feel my skin sliding in and out of her cunt, which gives an added enjoyment. She says she also prefers my uncut cock to the cut cocks of fellows who fucked her before me, including her first husband, who, although he was somewhat bigger did not fuck as well as I do.