UNKNOWN
It was difficult for the youth to know.  I'll cite some two cases where a chief had a very serious problem with birth.  He had three wives but these three wives didn't have kids, so he went to see a traditional doctor who said, if you could get certain parts of your closest relation, the man that you eat with, such parts when mixed with certain drugs, if you take them, all these three wives of yours will have children.  The chief said "but I've never killed a person ritually".  "Don't worry, go and see Doctor A."  He went to A and he said "don't worry, I'll call in others, on a Christmas Day we will meet there and do the whole job, but you must be there too".  Well they killed a very close uncle of the chief and after a very serious police investigation, the chief was arrested, he and his closes subject were sentenced to death, that was 1949.