This won’t end the debate of course. Those on both sides who know the Truth will continue to argue no matter what studies come up.. er, are published.
Nevertheless, the largest study so far, from Johns Hopkins University, of 5,000 Ugandan men asserts that male circumcision does not reduce sexual satisfaction. Moreover what differences there were in satisfaction and ability to penetrate were just over 1%, well within the 3% margin of error. They also reported that “marginally more circumcised man reported that they had no pain during intercourse, compared with 98.8% of the other group,” but do not say whether that too, was under the 3% margin of error.