Disgusting. If an adult tried that with me at age 15, I would have used his scrotum for field goal practice. Some kids are more easily manipulated, I suppose.
When I was a kid in the 50s, the Good Humor ice cream truck drove around our suburban neighborhood on warm afternoons. One day the driver fondled the tiny new breasts one of the 12-year-old girls in front of the other kids at the bus stop. When he turned back towards the truck, she kicked him like a volleyball directly between the arse cheeks, and he fainted across the hood of the truck. When he came to, moaning, he said he had just had hemorrhoid surgery. Few of the kids knew what that was, but everyone laughed and jeered at him.
Girl took care of it Irish style. He's lucky there were no brickbats lying around.