Gay Pride?

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Of course, National Geographic is also part of the evil gay conspiracy for world domination.

National Geographic

The bonobo, an African ape closely related to humans, has an even bigger sexual appetite. Studies suggest 75 percent of bonobo sex is nonreproductive and that nearly all bonobos are bisexual.

Robin Dunbar is a professor of evolutionary psychology at the University of Liverpool, England. "The bottom line is that anything that happens in other primates, and particularly other apes, is likely to have strong evolutionary continuity with what happens in humans," he said.