Tracie Egan has assembled the mindboggling: "10 CASTRATION SCENES FROM HORROR MOVIES." Probably, you don't want to click on that NSFW link if you have a penis, but since I don't, I found the whole, incredibly graphic lineup to be pretty fascinating, especially the one with the dog. I guess this is the part where I should say something more, but what do you say after that thing with the Rottweiler? Not much, really.
(Image from "Ilsa, She Woolf of the SS.")