Sisa, along the southern edge of the central mountain range of New Guinea, near the Papuan Plateau.
They are well known among anthropologists because of ritual acts practiced between the young boys and men of the tribe.
[1] In 2009, the National Geographic Society reported an estimation that there were fewer than 1668 speakers of the Etoro/Edolo language.
[2] O'Neil and Kottak agree that most men marry and have heterosexual relations with their wives.
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