There's a few martial arts that requires the practitioner to castrate his "....." in order to learn the martial arts. Martial arts such as Kuihua Baodian and Bixie Swordplay requires this basic requirement.
Does castration have any side-effects (eg. shorten life scan, fatigue) or affect any other aspects of your body such as your internal energy, physical strength, speed or agility? Or does it only affects the hormones?