True story from 1 Samuel 18:25-27. This, of course, is the foundation of Judeo-Christian morality.
My wife is worth a lot more foreskins than that, but I don’t think she’d appreciate it if I went all serial killer and marched through Stevens County chopping off penis tips and bringing them back to her in a bloody sack.
Also, it would be like those obnoxious World of Warcraft quests. “Bring me X body parts from this animal!”, and then you go slaughtering and most of your kills don’t even have that body part. I still remember having to kill zebras for their hooves, and finding most didn’t have any.