The plan to get Art to come to America to castrate me and then for me to claim that a wild animal did it, had problems. It would be very unlikely that an animal specifically attacked and bit off my balls. To make it believable, I would have to also have other wounds to my body, but I am not an expert at giving myself wounds without risking breaking arteries or vains that could cause severe blood loss.
So perhaps Art should fashion coyote jaws out of clay, with the sharp teeth of coyotes. I live in a part of America that has lots of coyotes so it would be believable that a coyote attacked me.. He can use the jaws to press into parts of my body to create a whole ton of bite marks.