The Louder the Monkey, the Smaller Its Balls, Study Finds
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The Louder the Monkey, the Smaller Its Balls, Study Finds
https://www.vice.com/en/article/kb7eew/the-louder-the-monkey-the-smaller-its-balls-study-finds-42361364663309
Howler monkeys can be well-endowed in the voice box or the family jewels, but not both.