[Sidenote: Reasons for entrusting the making of fire to unmarried boys and girls.] It is not hard to divine why the task of twirling the male fire-stick in the hole of the female fire-stick should by some people be assigned to married men. The analogy of the process to the intercourse of the sexes furnishes an obvious reason. It is less easy to understand why other people should prefer to entrust the duty to unmarried boys. But probably the preference is based on a belief that chastity leaves the boys with a stock of reproductive energy which they may expend on the operation of fire-making, whereas married men dissipate the same energy in other channels. A somewhat similar train of thought may explain a rule of virginity enjoined on women who assist in the production of fire by holding the female fire-stick on the ground. As a virgin’s womb is free to conceive, so, it might be thought, will be the womb of the female fire-stick which she holds; whereas had the female fire-maker been already with child, she could not be reimpregnated, and consequently the female fire-stick could not give birth to a spark. Thus, in the sympathetic connexion between the fire-sticks and the fire-makers we seem to reach the ultimate origin of the order of the Vestal Virgins: they had to be chaste, because otherwise they could not light the fire. Once when the sacred fire had gone out, the Vestal in charge of it was suspected of having brought about the calamity by her unchastity, but she triumphantly repelled the suspicion by eliciting a flame from the cold ashes.[778] Ideas of the same primitive kind still linger among the French peasantry, who think that if a girl can blow up a smouldering candle into a flame she is a virgin, but that if she fails to do so, she is not.[779] In ancient Greece none but persons of pure life were allowed to blow up the holy fire with their mouths; a vile man who had polluted his lips was deemed unworthy to discharge the duty.[780]