Never had sex with the foreskin held back, no. Have discussed circumcision with English girls a few times, but not in much detail. The most interesting was when I was sleeping with an English Jewish girl who would joke sometimes about how little effort it would take to circumcise me. Another time, the first time a girl touched my cock I was really hard and was lying in such a way that my foreskin was pulled right back. She sort of groped it with some surprise (under the sheets) and had to ask me if I was circumcised with this curious (I sometimes wonder: excited?) tone. That was kind of nice. Then a more recent ex had previously had a long term relationship with an American guy who was of course circumcised. One time after we finished having sex and I was soft she exclaimed that she hadn’t realised I wasn’t circumcised. We talked about it briefly and she said she preferred uncut because she thought it seemed more pleasurable for the guy. A couple of other girls who apparently had lots of experience with circumcised guys talked about having to relearn sex techniques for an uncut guy, but neither expressed any preference one way or the other.