In theory, any individual charged with an offence is presumed innocent until proved guilty. But, with regards to substances, folks are always ready to think the worst and never permit the facts obstruct of the really good urban myth. For more than a century or two, everybody been fixated with the idea that saltpeter enables you to induce impotence in men. For those of you with an interest in the scientific side of life, saltpeter is best generally known as potassium nitrate (KNO3) and, for most decades, rumor had it this dreaded substance was craftily slipped into the food of prison inmates, those lucky enough to get serve their country inside armed forces, and teenagers in single-sex schools and colleges. The result was peace and calm. All those unfortunate sexual urges that could have made it difficult to keep up discipline, were happily damped down.