Squirrel monkeys are certainly not discrete when they need the toilet. In fact, urinating is not only for relief, but also for having a wash. These tiny monkeys bathe in their own urine, called ‘urine washing’, for a number of reasons: to mark their territory, to communicate with other members of their troop, and for a cooling effect through evaporation.
![The common squirrel monkey is captured for the pet trade and for medical research but it is not threatened.](https://cdn.animalencyclopedia.info/wp-content/uploads/2016/08/squirrel-monkey.jpg)