monkey!

Generally, monkeys do not make good pets. They may appear to be nice and friendly and can resemble human babies for some people, but they should not be looked at as pets. While baby monkeys are usually as easy to keep clean as a human infant (by diapering), monkeys that have reached puberty usually remove their diapers and cannot be toilet trained. They require constant supervision and mental stimulation. They usually require a large amount of attention. Monkeys can not handle being away from their owners for long periods of times, such as family trips for example, due to their need of attention. Bored monkeys can become extremely destructive and may even go so far as to smear or throw their own feces. There needs to be a lot of time set aside for cleaning up whatever mess the monkey might make.