http://www.artofmanliness.com/2010/02/21/male-rites-of-passage-from-around-the-world/
The Sambia believe that both men and women are born with a
tingu. The tingu is a body part that allows for procreation. A woman’s tingu is ready for reproduction when she first menstruates. A man’s tingu is born shriveled and dried and the only way to fill it is to
drink the “man milk,” or semen of other sexually mature men. They believe that by
drinking the male essence of other men, the boys will become strong and virile. Done in the privacy of the forest, a boy will perform fellatio on young, usually unmarried men between the ages of 13 and 21. The boys are encouraged to “
drink the male essence” as much as possible in order to become strong.
Around age 13, a young man has started puberty and another stage in the initiation begins. Another ritual nosebleed takes place along with some beatings to purify the young man. The boy is now considered a bachelor and will now provide the “man milk” to young boys just starting down the path of manhood
Glad I live in the US