What are the ancient practices of the Indian "holy women"?

India's "holy women", from India's ancient traditions. A long, long time ago, the poor that is, the so-called untouchable family girls, a young age to the monastery "service", become a senior Hindu monks and Brahmin elders of sexual slavery, so-called "holy girl". These girls from poor families with low status give up the traditional mode of marriage and dedicate their lives to Hinduism. When these girls reach puberty, they are married off to monks through certain rituals and ceremonies, and then they sleep in the same bed with the monks or elders of the monastery. In front of people, they have a glorious name, called "holy women"; behind the scenes, all know, but is a senior Hindu monks and Brahmin elders free "sex slaves".