In a new sword-and-sandal epic, Dwayne Johnson plays the mythological hero seeking vengeance for the death of his family. “He has to kill a lot of people while keeping his loincloth down,” says the actor, who sports a beard made of yak hair. When he asked the beard designer what part of the animal supplied his facial fuzz, Johnson recalls, “he says, ‘His balls.’ I said, ‘No wonder I feel comfortable.'” The star confirms he would love to reprise the role. One group hoping that he won’t: male yaks.