Penile Enlargement Surgery: Penus Pump - Version - Penile enlargement surgery comes with risks and it entails cutting some of your body's ligaments; in this case the ligaments that join your penile to the underside of your pelvic bone. About half to one third of your penile is hidden within your body, so by dissociating some of these ligaments, your penile will be more exposed. Hence giving your penile a longer appearance, or extending you penis if you will.