Why is it funny to watch someone get hit in the nuts?

It isn't. Unless you're a female who has no clue and no compassion.

Because you do not have a clue about the feeling or the damage it can do.
It is NOT FUNNY

Its not. It just a dumb homo erotic thing that some guys do to each other.

@CarltonTheDoorman yes that is it, thank you.

As a man who has had unwanted/painful contact with his testicles in the past, I assure you, there is no humor to be found there. I wince sympathetically when I see it happen on TV... 😨🤕😜

@zhaich - I believe that schadenfreude is the term you're looking for? http://www.merriam-webster.com/dictionary/schadenfreude

It's a thing for people to laugh at other's misfortune if they don't imagine the same scenario happening to them.

It's funny to people who get off on other people's pain and misery.

Says the girl..lol

Because it`s not me. :p

Because.