Cum

(Ironic, cw: Cum) Cum, known informally as semen, is a biochemical weapon of mass destruction produced by the testicle found in every vertebrate on earth.

It is the only substance in history to be unanimously outlawed from use as a weapon by every nation on earth, most likely due to its abhorrent effects on the human body and the sheer number of living beings that die with each use of this substance. No reliable historical records of cum being used as a weapon in conventional warfare exist.

Uses
Cum has virtually zero practical uses.