Fun fact about chimps; the size of their testicles is directly related to how much the female chimps sleep around. Big balls are also co... | Instagram
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A Macaque Male with Big Balls Testicles Sits on a Rock Under a Tree Stock Photo - Image of closeup, monkey: 139038486
![We've either got big mouths or big balls – but we can't have both | The Independent | The Independent We've either got big mouths or big balls – but we can't have both | The Independent | The Independent](https://static.independent.co.uk/s3fs-public/thumbnails/image/2015/10/23/12/Monkeys-calling.jpg)