I know a guy who had only one testicle. He was a friend of my brother’s. Or maybe he had three. I forget, but for sure he didn’t have the regulation two.
Why do most of the rest of us have two? Why do you have two eyes? Two ears? I would say it has to do with genetics, and maybe something to do with symmetry.
And it may be nature’s way of giving us a spare in case we lose one. (Owwww).
Or maybe because that’s that’s way God did it.
There’s no actual answer to this question as there is no owner’s manual for our bodies.
Sorry, @Unbroken I just read your response, “Symmetry? A back up system?”
Unbroken seems to have hot the nail on the head.