There are studies on it and even strongly anti circuncision associations.You actually have no facts, just your opinion. Guess what I am actually circumcised and guess what? Not mutilation and everything works. It literally is excess skin.
I will not offer any links as it is a graphic topic, so have no place on this Catholic forum.
Of course a man who is circuncised has still everything that “works” and I am happy that you feel confortable with that.
That does not mean that circuncision will never induce small changes in sexual intimacy. At least for some couples.