The Sambians: Real Men Drink Semen.

As horrible and disgusting this might sound, yet it is true. The Sambian tribe in Papua New Guinea have a ritual of initiating young boys to men.
At the age of seven the young boys are isolated from females and are taken to a place where they will live with men for ten to fifteen years. During this period, the boys are being thought how to survive and become great warriors. Part of these teachings include educating them of the dangers of women to men, first they learn to detach themselves from their mothers and the females around them and learn to survive without women and prove their manliness.
In the initiation process which is the first stage a sharp stick is

inserted deeply into the nostrils of the boys until it bleeds profusely. This may sound strange to you, but in the second stage which involves the boys being introduced to the older men to copulate with them, according to the Sambians, this helps them to grow. Also the boys are made to ingest the semen of the older men as they believe that the spirit of manhood lies in the semen.
But note that once the initiation is over, these boys who are now men can marry women and start their own family.