Hmmm.

Scenes of Africa: Zulu Birth Control

King Shaka had a genius way to stop his warriors from being distracted by women. It was a common tactic for opposing tribes to make naked women parade in front of the incoming warriors and cause them to stop their attack. Shaka created this tool, that was placed on each warriors penis, so that when they saw the naked females, the device would “pinch their snake and make them stop”.