Koku Voodoo in Benin
Southern Benin is the core of the voodoo religion, one of the oldest in the world. One section of that religion is devoted to the spirit of Koku, known as healing god that protect against witchcraft and other evils.
The believers protected from harm by smearing a paste made of palm oil, maize (or sorghum) flour and herbs on their bodies. When in Trance, They sometimes cut themselves with a special knife, blood pours from their wounds, and they feel no pain!