Alright, I will add my two cents, too! Some of you have heard this before, so I apologize. All my partners where circumcised until I met my SO. He isn't cut. I was probably as curious about my new play thing as you are! An uncircumcised penis is interesting, and you will enjoy the differences if all you are used to is the other. The skin is attached right below the head. I suggest a medical website for clear detailed pictures if you want a closer look. They're not nearly as scary as they sound! ha~ha This is my/our experience. As my guy becomes more aroused, the head of his penis starts poking out, and when he is fully aroused, the head is totally exposed. He loves it when I start a blow job lightly running my tounge around under the skin and gently licking him. Drives him crazy! As far as durring sex, the skin is retracted, but does add some extra 'girth'. He has been able to make me squirt when all others have failed! From what I have notice between him and other partners, My guy's penis seems much more sensitive. I think because the head doesn't rub on his clothing all day. Unless he is unusally large, condoms fit exactly the same way. Personally, I LOVE my guys penis, and now wouldn't like one any other way. When the time comes, do some playing, up close kissing and touching. Watch his penis change and read his reactions. Ask him what feels good and what might not. He will appreciate your candor, and the idea that you want to learn about his body and please him. In all your new exploration. don't forget to relax and enjoy your own body and its response to him! That is, after all what it is all about. Best wishes and enjoy!