When Crassus met the Parthian ambassador Vagises on the eve of his disastrous expedition ending at the Battle of Carrhae in 53 BC, Vagises mocked his boldness and showed the palm of his hand, on which, according to him, no hair would ever grow unless the Roman were to reach Mesopotamia, the heart of Parthian empire. This bizarre gesture and statement, usually assumed to be frivolous, can only be understood in the context of Zoroastrian sexual and cathartic ethics, which of course no Roman or Greek could understand. The source of this information therefore could not have been Plutarch, but rather someone conversant with Persian culture, from either Parthian or Armenian stock.
