A Canadian company has developed
a pheromone spray which instills fear in rivals. The spray contains androstenone, a male hormone signalling dominance, and causes the wearer's opponents to "subconsciously feel fear, intimidation and submission". It is aimed at athletes seeking an advantage in sporting competitions; however, as the street finds its own uses for things*, one can imagine non-athletic applications for it. Riot police, ticket inspectors, skinheads and football hooligans could all find uses for it, for example; meanwhile, high-pressure businessmen could wear it to "psych out" their rivals. And perhaps some adherent of the "chicks dig jerks" school of sexual relations will even apply it to picking up women.
And speaking of women, I wonder whether androsterone would be as effective when worn by a woman. If the rumour about female MPs in Britain having testosterone implants to better compete in the territorial sparring ground of Parliament is true, that could be an entire market in itself.
* aside: perhaps this statement should be referred to as Gibson's Law or something?
Google indicates that androsterone is already sold overwhelmingly as a seduction aid. "Androsterone: attract women, frighten athletes!"