Why Do Monkeys Eat So Fast?

in zoos, you often see monkeys stuffing their mouth with food. They seem to swallow it without chewing. But actually, what they throw into their mouths just stays in their mouths.

Monkeys have two cheek pouches like two pockets. They can store food. When there is enough food in its mouth, it will find a safe place and pull out what it has stored. Then, the monkey will enjoy more careful eating.