All patients included randomly receive either two injections at the dorsum penis according to Dalens' technique, or two injections at the dorsum penis according to Dalens' technique plus on subcutaneous injection in the ventral midline of the penis at the transition between the penis and the scrotum. The amount of local anesthetic (bupivacaine 0,75%, 0,2 ml/kg of body weight) and dosing of narcotics (Sevoflurane 2,2 Vol% end-expiratory gas in an oxygen-air mixture) is the same in both groups.