You made me loose it! LOL!
Uncle John at the farm used to take us to the barn to help him. Yeah, pretty graphic but...Life.
Then there are the reindeer herders in Scandinavia. Reportedly the SAMI, think Native American, Eskimo, well the knives long ago were important so the herders, usually the women, did it with their teeth.
I kid you not. A gal acquaintance still goes with her dad and has told me about it.
Slit the scrotum with the knife and bite the cords of the testes. I’ve see that done too.
Don’t even get me started on animal husbandry or animal masturbation!