 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.However, both studies concluded that there were no significant differences in sexual function between circumcised and uncircumcised men.The 2015 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."