Not many people ever experienced being attacked by dinosaurs, so we can enjoy Jurassic Park, though not everyone. Likewise, not many people ever experienced ball injury.
I mean, you don't need to experience an injury, just a small hit in your crotch, sitting in your balls or getting hit when somebody open a door. But, I understand that some people get excited by the thrill of being badly injured. I think Alice is not stomping that guy's balls, but "massaging" his crotch in a really rough way.
Want to get crushed don't you?In that case I will do it for you right away.