Think you've got what it takes to be a man? Try going through what the young men from the Satere-Mawe tribe of Brazil do. Young men must place their hands inside gloves that have bullet ants sewn into the fingers. The pain one feels from this ant is akin to being shot (hence the name) and the boys must not show signs of agony for 20 minutes, while other members of the tribe sing and dance around them. If that weren't bad enough – they must repeat this ritual 20 more times.