The best kinds of dirty jokes are unexpected dirty jokes. They just seem to hit that much harder when you didn't mean to say anything dirty at all.
This woman, Laura Curran, is a local politician on Long Island, and she was holding a press conference to talk about how people can safely play tennis while cutting down on human interaction. When she started going on about balls, she kinda lost it.
Realistically though, if you are playing with your balls, it's best to play with them at home and not in front of strangers. Also probably don't want to go banging them around with a racket unless you wanna end up in the hospital.