I grew up on a ranch. I am not sure if I have eaten bull testicals but I have eaten Calf Fries which are tesicals from the calf, cut up and slices and strips battered and deep fried. Its a huge country thing. I have also eaten rattle snake (kinda chewy), Frog legs (had a strong fishy smell), and dog meat (I believe we had husky but not too positive however it was really sweet meat). So I might try python.
here is a joke
a french man got a job at a restaurant in a small country town. one day a cowboy walks in and orders calf fries. The French man ask the cowboy what calf fries are and the cowboy said they are testicals from a calf chopped up, battered and deep fried. a couple days later a city guy comes in and orders lamb fries the french man was like what in the world is that. the guy explains they are testicals from a lamb chopped up, battered and deep fried. later that day a kid came in and ordered some french fries... The french man left!!!