"The distribution of circumcision and initiation rites throughout Africa, and the frequent resemblance between details of ceremonial procedure in areas thousands of miles apart, indicate that the circumcision ritual has an old tradition behind it and in its present form is the result of a long process of development."
African cultural history is conveniently spoken of in terms of language group. The Niger–Congo speakers of today extend from Senegal to Kenya to South Africa and all points between. In the historic period, the Niger–Congo speaking peoples predominantly have and have had male circumcision which occurred in young warrior initiation schools, the schools of Senegal and Gambia being not so very different from those of the Kenyan Gikuyu and South African Zulu. Their common ancestor was a horticultural group five, perhaps seven, thousand years ago from an area of the Cross River in modern Nigeria. From that area a horticultural frontier moved outward into West Africa and the Congo Basin. Certainly, the warrior schools with male circumcision were a part of the ancestral society's cultural repertoire.
In traditional circumcisions, often the same knife is used for many initiates. This is thought to contribute to the spread of HIV.
In addition to traditional circumcision, the men of Africa enjoyed "benefits" such as young men became members of the warrior class, and were free to date and marry. The graduates became a fraternity which served together, and continued to have mutual obligation to each other for life.
In the modern context in East Africa, the physical element of male circumcision remains (in the societies that have historically practiced it) but without most of the other accompanying rites, context, and programs. For many, the operation is now performed in private on one individual, in a hospital or doctor's office. Anesthesia is often used in such settings. There are tribes, however, that do not accept this modernized practice. They insist on circumcision in a group ceremony, and a test of courage at the banks of a river. This more traditional approach is common amongst the Meru and the Kisii tribes of Kenya. One boy in Meru County, Kenya was assaulted by other boys because they wanted him to be circumcised in a traditional ceremony as opposed to in a hospital. Amongst the Gikuyu (Kikuyu) people of Kenya and the Maasai people of Kenya and Tanzania, male circumcision has historically been the graduation element of an educational program which taught tribal beliefs, practices, culture, religion and history to youth who were on the verge of becoming full-fledged members of society. The circumcision ceremony was very public, and required a display of courage under the knife in order to maintain the honor and prestige of the young man and his family. The only form of anesthesia was a bath in the cold morning waters of a river, which tended to numb the senses to a minor degree. The youths being circumcised were required to maintain a stoic expression and not to flinch from the pain.