Around 80 percent of Vatican priests are gay, according to a new book which details alleged secret relationships, male prostitutes and stunning hypocrisy from the most anti-gay members of upper echelons of the Catholic Church. While not all the priests detailed in the 570-page book act on their sexual preferences, many are allegedly engaging in relationships with their fellow fathers, while some prefer casual hook ups and others are hiring male prostitutes, according to the review in Catholic publication the Tablet.