A bit ironic that the studies saying that circumcision doesn ' t reduce sensitivity used to prove that the study saying it does are themselves faulty . The change isn ' t immediate , and can really only be noticed by adults . Medically , it ' s actually a lot safer to perform on adults but the negative effects are a lot more noticeable since there is actually something to compare it to . It ' s safer for adults because , as an infant , the foreskin is attached to the glans almost all the way to the top , instead of just at the base at adulthood . This requires a lot more cutting to be done to get the foreskin off . The foreskin protects the glans and keeps it moist . This is no accident , it ' s what it ' s for . The dryness is what causes the loss of sensitivity , as well as likely the protection from UTI ' s since they likely require some form of fluid transmission to effect you . This is a very silly solution , akin to avoiding choking by not eating . Regularly cleaning under the foreskin is enough to prevent UTI ' s . Scarring is a natural result of cutting skin , no matter how hard they are to see they are still there . No one has memory of their infant years , yet you didn ' t need to relearn how to walk , speak your first words or how to feed yourself twice . As for infections , even procircumcision sources recognise this is a possibility even if they downplay it .