Concealing sex is thought to be pretty consistent across human cultures. The Yanomami of Venezuela, for instance, arrange trysts away from villages and out of the public eye. Married Malekula couples of Melanesia return home from a rendezvous in different directions. And Mehinaku couples in Brazil have sex only in secret locations. In fact, the penchant for private sex has been considered a universal human trait and one that may have influenced the evolution of human emotions and advanced cognition.
