Figure. It's not exactly pleasant being groomed by an ape. The ape grabs an area of skin and pinches you really hard, leaving a sore, red spot. "But it does stimulate the body's production of opiates so you feel good afterwards. It's a bit like a sauna. It may not be immediately pleasant being beaten with a bunch of birch twigs but it leaves you with a glowing sensation of good health." Dunbar, author of The Trouble with Science and Grooming, Gossip and the Evolution of Language, is back in his study in Liverpool. As a psychologist, his research…
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