A Continental European viewpoint
Here in Europe, basically no one is circumcised at birth. All the men I dated before my marriage were uncircumcised. Interestingly the foreskin's morphology differs very much from man to man; in some cases the glans was fully covered even in full erection, with some of the skin protruding beyond the tip of the glans. In other cases, there was virtually no foreskin covering the glans, very much like a cut penis. The majority were almost covered fully when limp. My husband had a fairly long foreskin which would extend over the glans even when fully erect. Of course, it could be easily pulled back and I particularly liked to do that during foreplay. The feeling of the foreskin moving back and forth over the erect penis is quite stimulating for the female partner. I also liked to give small bites to the foreskin.
For me, sexual intercourse was pleasant but not terribly gratifying. It seemed to me that my husband was penetrating his own foreskin rather than my vagina. Once or twice, I discussed that with him, suggesting we should hold his foreskin back during intercourse. Obviously this was not very practical.
While I was away visiting my parents, my husband secretly decided to go for circumcision as an outpatient. On my return, ten days later, he found some good excuses for not making love for a few days. I was getting suspicious about his behavior when he told me all about it. After my initial shock, I was impatient to see what they had done to his penis. I had never seen a circumcised penis before and only knew that some communities practiced circumcision as a religious rite. The appearance of his newly-circumcised penis amazed me and I found it to be extremely erotic. I could see a clear dark line close to the glans, where the incision was made and the glans itself was proudly on display. Though he said he was still sore, the cut had completely healed up. His foreskin was totally removed and his shaft was smooth. The frenulum was intact and there was enough skin mobility over the shaft for caresses and masturbation.
We made love for the first time about 10 days later (i.e. 25 days after his circumcision). I must admit I felt his thrust much more intensely and enjoyed sex much better than before. He also felt much better inside me. In one day I moved from a total ignorance of circumcision to being pro-circumcision. My sex life has radically changed and so has my husband's. His glans seems to have grown bigger and the look is neater and more appealing. Regarding sensitivity, all we've heard about decreasing sensitivity is simply absurd. My husband responds positively to my slightest touch.
I have meanwhile got interested in this subject and discussed circumcision openly with a few of my female friends. Three of them have had sex with circumcised men as well and have experienced similar feelings. One negative point though - masturbating a circumcised penis is somewhat less practical as the remaining skin is less mobile. However the other advantage overrule this point.
My husband's only regret is that he was not circumcised as a baby as he was quite embarrassed to undergo this procedure at his age. Our 2 sons were circumcised in their first month, not to "look like dad" or for any other classical reasons such as hygiene or cancer, but because we are convinced that circumcision definitely enhances sexuality. And cosmetically, what a look, WHAAOO! It seems that the US is crowded with anti-circumcision movements giving all kind of funny reasons why circumcisions should be "abolished". The only good reason I would see in their views is the pain the poor little baby is undergoing. Today a large panoply of local anesthetics are available, so your dear little one need not feel it at all.