nofoe.cn

閹割（切除睾丸）對於性慾的影響我考證了一下：
http://en.wikipedia.org/wiki/Castration

1. A subject of castration who is altered before the onset of puberty will retain a high voice, non-muscular build, and small genitals. He may well be taller than average, as the production of sex hormones in puberty—more specifically, estrogen via aromatization of testosterone—stops long bone growth. The person may not develop pubic hair and will have a small sex drive or none at all.
即：在青春期到來前即被閹割的人會保留較高的嗓音，不產生肌肉線條，生殖器也不會變大。他可能會長得比一般人高，因為青春期時產生的性激素（更確切地說是某種雌激素）會使長骨停止生長。此人將不會長出陰毛，並且性慾很弱或完全沒有。

2. Castrations after the onset of puberty will typically reduce the sex drive considerably or eliminate it altogether.
即：青春期到來之後進行閹割的人的性慾通常將劇減或完全消失。