It has it's roots in almost all religions actually...And yes, mine is but one of them.
The tribal custom is found all around the world, and has similar customs in each place (Native America, Africa, Asia, and Pagan Europe are some of the places it has existed). Two friends consecrate their friendship in a ceremony where the exchange of small quantities of blood symbolizes union. The blood is often considered to be magical, and this magic blood brings misfortune to friends who betray one another. Often, the expectation is that the friends will stay together for the rest of their lives. Not all tribal cultures have a custom of formally consecrated friendship, but it is quite possible that a majority of tribal cultures have had such a custom.
Pagan Blood-Brotherhood in Northern Europe for example had blood-brother rituals like many other places. As Christian missionaries swept across Europe, the earliest among them consecrated Blood Brotherhood ceremonies in the doorways of Catholic churches. This means that Catholic priests officiated at same-sex commitment ceremonies—but for the most part, these were not “gay weddings” since the ceremonies did not relate to sexuality. Like other Pagan customs, blood brotherhood had to be retained in order to keep new Christians happy, but it also had to be changed in order to reinforce Christian doctrine. Clerics were concerned that these intense relationships would distract people from God, and that the blood symbolism would compete with the symbolism of Communion. Therefore, they changed the ceremony to “Godsibb,” or “siblings before God.” Godsibbs were obligated to help each other in their material lives, much like blood brothers. At a certain point in the development of “gossipry,” an incest taboo was developed: opposite-sex godsibbs were taboo sexual partners in the same sense as brothers or sisters, and hence these relationships did not lead to marital jealousy.
Godparents was the next progression from godsibb. This custom watered down the ceremony more, by associating it with the birth of a child to a married couple. The implication was that although helping a couple raise a child was important, friendship was not important enough on its own to merit a ceremony. In Anglo cultures, godparenthood has been watered down to meaninglessness, and people even choose blood-relatives as their children’s godparents. There are no cultural expectations for Anglo godparents to be seriously involved in the child’s life, although some are.
The Latin American custom of compadrazgo, derived from the same source as godparenthood, actually became more intense, returned to its original function of cementing a ritual friendship between adults, and is still widely practiced. For those without children, the ceremony involves the “adoption” of a tree, shrine, or similar object. Both same-sex and opposite-sex friends can become comadre/copadre; in some places it is customary to have one woman and one man participate in compadrazgo upon the birth of a child, but the man and woman are not supposed to be married to each other.
Okay? Now today, it is no joke. I take it seriously when asked to prform one. I make sure they are tested for all blood diseases, as my previous background in Wicca demanded of me to. And I try to do my part in insuring that the ritual goes well. But, I no longer consider myself a Wiccan. But I still hold level 3 ranking in the Coven I was in. I view Wicca as being a stepping stone to the Khemetic/Kemetic belief structure.
I think of it as being a ritual to combine houses, adoptions, or for the pledging of brotherhood; love; etc...Blood is spirit, so to combine ones blood in a ritual is to conbine spirits.
The way I know how to do it, is the ancient Egyptian way. Ancient Egyptians had a right where the priest would evoke the Gods to come watch, you make your pledges before the Gods and your friend makes his, you then cut your friends hand and he/she would cuts yours, you both would join hands together over and bleed and then spit into a cup of either wine, beer, or meed, and you and your friend drink from it; but leave most of it for an offering to the Gods who came...As was bread and fruits. The priest would then wrap their hands in cloth or hide.
When we look at it this way...Jesus (who according to legends grew up in Egypt) did a blood brother rite at the last supper. If we take the Bible literally. For those Gnostic out there, I understand that the blood of Jesus was in his kids; etc...but by drinking a blood oath, would they not have there by sworn all of their loyalties to his kids and his teachings? It is something to think about.
As you all will find out, I studied almost all major religions before settling on one that felt right to me.
Look at:
http://en.wikipedia.org/wiki/Blood_brother , and also
http://www.celebratefriendship.org/chart.htm if you want to see the site I quoted today...Although the web page is a more gay oriented. But still, it is truthful.
Thank you for your time.
Shannon.