ABC News reports on the health-endangering possibilities of 'Sack Tapping'—A Schoolyard Game Turned Ugly::

Gone are the days when bullies merely gave wedgies. The newest fad in schoolyard violence? A quick slap to the testicles. In the game of "sack tapping" or "ball tapping," as it is called, a boy will try to slap or flick the groin of another boy to inflict discomfort or pain.

The "game" has gotten out of hand, however, according to Dr. Scott Wheeler, a pediatric urologist in Minnesota. In recent years he's seen an increasing number of young boys coming in with serious damage to the testicles because of a "tap" that hit too hard. "For some reason, [this game] is popular," Wheeler says. "It's not just bullies, it's kids doing it to their friends. It's rare that bullies target the testicles, they just beat up people."....In some cases, trauma sustained by sack tapping can be severe enough to rupture a testicle, an injury that can require surgery or even the amputation of the testicle, says Wheeler.

Read the rest of the piece—which covers everything from the appeal of "Playing 'Chicken' of the Groin" to "The Psychology of the Sack Tap"—here.