For example: Harvard primatologist Richard Wrangham
has developed a theory that postulates that learning to cook was the evolutionary key that gave early hominids the nutritional boost they needed to develop larger brains . Wrangham, a student of Jane Gooddall, spent 20 years studying West African chimps and became intimately familiar with the daily diet of chimpanzees — primarily raw tubers — which he realized would be totally unsuited for the diet of any hominid. Hominids had (and have) much weaker jaws and teeth than their primate cousins and would not have been able to eat enough of the food chimps eat to sustain significant brain development. This eventually led him to wonder about the diet of primitive humans and thus to the question about cooking.
(Yes, I know chimps are not monkeys…stop being a party-pooper)
Meanwhile, a group of German researchers studying Barbary Macaques has learned that the reason female macaques scream during sex is that the males need the auditory cue in order to ejaculate. I will leave you to consider the evolutionary consequences on your own (nudge-nudge, wink-wink).
