Another health reason for us in having our DS done was that although now hygiene is very good and boys can be taught to clean themselves when DH was in the army and "out bush" where there was no access to water for washing yourself he saw uncirced guys with really bad infections just because they had no facilities to clean themselves, a friend who was married to a submariner said her DH saw the same thing. (i realise not many of our sons may enter the defense force but just another point)