Hello. I had a friend in the past that would send me castration stories. They usually involved castration as a form of capital punishment and were often accompanied by a few illustrations.

One story in particular was about a young guy who had gotten a girl pregnant out of wedlock. He was punished by castration along with five or so men. They were in a room and restrained were a weight would increasingly crush their balls. They had a probe inserted that destroyed the prostate. 

If this sounds familiar, or you know the authors name, please let me know. Thank you!