For some men, the balls can be a mega center for pleasure. There’s nothing you can do to them that they won’t love. But, for some men, ball play only comes with the sensation of being tickled, times 100, or excruciating pain. And for others, it’s complicated, like playing a game of operation. You’re always just a millimeter away from a sweet spot or from torturing him. So, if you’re going to go down there, start slow, gently, and ask questions. Of course, you may not have to ask if he’s fallen onto the floor squirming.