The biggest used 10,000 guys and reported that many more men reported that after circ sex felt better and was more satisfying
Welcome to the debate.
The two largest "ask if sex got better or worse" studies I know of were the Korean doctor's and the Bailey Africa/HIV trial.
The Korean asked men who - like some guys here - had real problems that required circumcision. Three-fourths said sex was neither better nor worse. Of the remainder, three-fourths said it got worse and one-fourth said it got better. This shocks me since they all had symptoms they wanted alleviated.
Bailey asked the HIV/circ volunteers (an average of a year after being cut) whether sex was satisfying. He compared that to similar before numbers and to the guys who weren't cut yet. What he got was satisfaction numbers around 99% in all cases. Actually, the intact guys went up a tenth of a percent, but statistically it was a tie, so the headlines screamed: "Circumcision doesn't reduce sexual satisfaction."
But he didn't measure anything, not even sexual satisfaction. EVERY other study that asks such a question tops out around 90% or below. His questioning was not sensitive enough to pick up any effect. But recall, these volunteers ALL WANTED to be circumcised for cultural reasons, so I'm not sure the results would mean much if had designed a relevant survey.
The fact that no placebo-controlled or double-blinded study could be contrived to justify amputating healthy normal body parts is not my problem. I feel equally unconcerned that nobody could use placebo-controlled or double-blinded studies to prove that people see nearly as well with one eye.
Either you value intact genitals and all your pleasure-receptive tissue or you don't. For some reason foreskin is the only healthy valuable body that it's ok to propose pre-emptive amputation for, simply because we're culturally accustomed to it, not because it ever made sense. Short of an immediate life-threatening condition there is certainly nothing to justify amputating parts from minors whose informed consent we could just as well obtain later.
Again, I'm thrilled with your thus-far successful outcome.