I was just wondering about this (tv brought it up tangenitally*).
Is there any difference between circumcised and uncircumcised in how they have to be put on/used?
No real difference in use - once the penis is fully erect the foreskin should be fully retracted, and the condom is unrolled down the penis. Otherwise, just ensure that the foreskin is fully retracted off the glans before unrolling the condom (as per the directions).
If the condom is on for an extended period of time and the erection subsides somewhat, there may be some binding of the foreskin in the condom during flacidity or later tumescence. It is generally not a big deal.
It should, but some men have slightly tighter foreskins require a little helping along (or, in some cases, circumcision). Plus you can have an erection and pull the foreskin back over the head, if you should so choose.
I once learned of a foreskin-related sex act that two gentlemen might engage in should they be of a mind, called “schnoodling”. The reason I knew this is because one of my linguistics instructors used “to schnoodle” as her default nonsense word to use when she gave us example sentences or otherwise illustrated certain kinds of semantic or syntactic behavior.
She generally used the term 3-5 times per class, and at least two of those uses was enough to keep our juvenile minds entertained through the rest. ^^
And some guys have a lot more foreskin than others. My partner’s foreskin still completely covers the head when he has an erection. Without an erection it hangs a couple of inches beyond the head.