Fetal Research, African Style

In parts of the world where medical techniques are not yet up to extracting bits of the unborn, they can do it after birth:

They first hit 10-year-old Sello Chokoe with a blunt instrument, causing a gash on his head. They then chopped off his penis, his hand and his ear. They were harvesting his body parts for "muti" - the murderous practice of traditional African medicine

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How the body parts are used varies with what customers want to achieve. They are eaten, drunk or smeared over the ambitious person. Various parts are used for different purposes. A man who had difficulty in producing children killed a father of several children and used his victim's genitals for muti. In another case, a butcher used a severed human hand to slap each of his products every morning before opening as a way of invoking the spirits to beckon customers.

On the other hand, maybe it was simply a belief in a finite pie which has to be redistributed:

Mathews Mojela is the head teacher at Sello's primary school. He has worked in rural areas for nearly a quarter of a century and says muti is founded in the archaic belief that there is only a limited amount of good luck around. If one wants to increase his wealth or luck, then it should come at another's expense.