The Bodi tribe live in the deep south of the African country and the contest is done annually to celebrate the tribe’s new year.
The competitors spend six months preparing for the big day with strict rules surrounding the event.
For half a year the men feed themselves solely on fresh milk and cow’s blood to fatten themselves up for the big day.
During this time they are not allowed to leave their huts or have s’ex, but they are waited on hand and foot.
Women and girls bring them milk every morning in their quest for big gut glory.
The only prize for the winner is fame and the adulation of his fellow tribesmen.
The area of the Omo Valley where they live does not welcome tourists meaning their traditions have been left largely undisturbed for generations.