That seems odd, as from my understanding it was the functioning of your testes that's distressed you, not any potential malfunctions.

When I had my tonsils out and was considering keeping them, I was told if I did X amount of paperwork and stuff I could keep them after they were examined. However, I didn't plan around it.

I'm always curious about people's relationships with their body parts that become not-part-of-them-anymore.