One study, conducted in 2015, determined that the foreskin does not provide a sexual response or serve a sexual function in men. Instead, it is the and frenular (the area "under" the frenulum) areas which provide sexual response due to the high concentration of genital corpuscles. Out of a large sample of Kenyan men in a controlled trial, 74.8% of men reported higher penile sensitivity two years after circumcision, while only 7.1% reported lower penile sensitivity two years after circumcision. It was deduced that even a retracted foreskin would tend to reduce the stimulus to the corona and frenular areas, particularly on the outward stroke of intercourse. The study determined that “any sexual effect of circumcision must depend solely on the exposure of the glans and not on the absence of the prepuce.” The study concluded that male circumcision has no adverse effect on parameters relevant to sexual function, sensation, sensitivity, satisfaction, or pleasure.