Among the Siwans (Siwa Valley, North Africa), "All men and boys engage in anal intercourse. Males are singled out as peculiar if they did not do so. Prominent Siwan men lend their sons to each other for this purpose" according to Ford and Beach (1951).
- ↑ Ford, C. S., & Beach, F. A. (1951). Patterns of sexual behavior. New York: Harper & Row