 In some Native American tribes enduring scarification or the bites of ants are common rituals to mark a boy's transition to adulthood.Human rights organizations in several areas of the world have protested some of these methods, which can be forced upon the participants, although some are voluntary and are a source of pride and status.Shamans often use painful rites and self-denial such as fasting or celibacy to attain transformation, or to commune with spirits.