'Show some balls' is the slang demand for an exhibition of courage perhaps this explains why I challenged my pair when I was prepubescent. Sweaty vulnerability, combined with totemic status as tanks of testosterone, marks the dangling pouches as principal targets for cutting-edge S/M games. The wrinkled 'turkey wattle' bags that sequester a man's 'family jewels' are densely webbed with nerve sensitivity a swift kick to the wobblies is crippling.