The Suku people only circumcise adult women.
Initiation is the process Suku boys go through to reach manhood. When there are enough boys that are uncircumcised, between the ages 1015, for the initiation, the elders can then announce the initiation to begin. After the circumcision, the boys are left naked for a couple of days where they need to sleep close together on mats on the ground. 
