The Himba tribe has a distinctive conceptional belief, according to which newborns are drawn to the womb by a spirit baby singing a particular song rather than being the sole product of the union of sperm and egg. An expectant mother who is also hearing this song.
A lady who wants to get pregnant does this ritual by making a bed under a palm tree on a windy day, listening to the breeze and learning the song of the spirit baby who wants to be born at that very moment.
The woman who wants to get pregnant learns the song, goes in search of the man she wants to be the father of the child, and teaches him the song. They sing the song and have a relationship together. It is thought that by singing the song throughout a $3xual encounter, the unborn child will be drawn to develop in the mother's womb.