Keeping pet monkeys raises ethical concerns due to several reasons. Monkeys are wild animals that have complex social structures and require specialized care and environments to thrive. Keeping them as pets can lead to stress, behavioral issues, and health problems for the monkeys. Additionally, the exotic pet trade often involves illegal and unethical practices, such as capturing animals from the wild or breeding them in poor conditions. It is generally considered more ethical to support conservation efforts for wild monkey populations and to enjoy observing them in their natural habitats rather than keeping them as pets.