A celebrated aphrodisiac since the times of ancient Rome, the truffle emits an aroma said to be irresistible to the female persuasion — at least to female pigs. Sows are traditionally used to hunt these delicacies, because the animals go after a pheromonal compound in the truffles' scent called androstenone, which is similar to male sweat. That's why this scent also works on humans — although for some it is too strong to be appealing, while a small portion of the population can't smell androstenone at all. However, for most — male or female — the indulgence in a truffle, whether black or white, is among the most alluring culinary experiences in the world.