Behavior: Abstemious Dani

They do not make love during the first two years of marriage, and they abstain completely for four to six years after the birth of a child. Premarital and extramarital sex are virtually unknown, and there is apparently no homosexuality or other sexual outlet. What is more, no one seems to show any signs of unhappiness or stress.

Superhumans? Subhumans? Figments of a science-fiction writer's imagination? In fact, the Dani are living quite nicely, thank you, in the Grand Valley of West Irian (formerly West New Guinea), where they were studied for 2½ years by Karl Heider, an anthropologist from the University...

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