Pheromones Having pubic hair allows sweating of the pubic area. This sweating, closely associated with the one of the underarms is responsible for secretion of pheromones, the chemical that triggers natural sexual reaction from prospective erotic compadres and helps other males in the tribe by triggering an increase in their testosterone when they smell it (The pheromones trapped in the pubic hair of a potent male). You certainly donβt want to fight natureβs way of matching you with ideal partners and tribesmen.