What kind of injury could cause a man to not be able to reproduce. Besides damaging both testicles?

Question

I know it's a weird question, but I'm a writer, and it is for a character.

Answer 1

exposure to radiation

Answer 2

Hmmm... lets see. There's when a guy turns g*y, obviously, he can still reproduce, but not exactly if he decides he's g*y, and if his p***s gets cut off. o.0

Answer 3

Mumps AFTER childhood.

Like in your late teens or early twenties.

Answer 4

Testicular cancer,chemo therapy and radiation come to mind.

And prostte cancer as well.

Planets.

Answer 5

electrocution...it could kill your live sperms...radiation, penile dysfunction...