I am from the States where circumcision is common, and married an Aussie who is not circumcised.
Yes, there is a difference. In a lot of ways the presence of a foreskin makes sex and foreplay easier. For instance giving a handjob - most circumcised men don't like a hand job that includes stroking the glans without lubrication because it hurts, while a foreskin slips over the glans and allows movement.
Giving head is pretty much the same, though it feels different obviously as there is skin there if the foreskin is not fully retracted.
Having intercourse is easier and less lubricant is needed, because the foreskin stays somewhat stationary during thrusting, preventing things from drying out.
Circumcision is so common in the States that most people there have never even seen an uncircumcised male, it doesn't help that most porn is produced there.
There are so many fetishes and sexual quirks that exist out there, some more niche than others. With very few exceptions I do not think those that enjoy them are weirdos or perverts.