Well, it is a joke. He looks so cool!
But actually having a monkey is no joke though. When I lived in Africa you could get one pretty easy (exchange for 2-3 gallons of cheap wine that is). But these things often are much more viscous than the most aggresive dog you have ever seen. And cunning too:
This happened in Angola, Africa in 1981. A friend of my mother had a monkey. One day the monkey got her feelings hurt or something. She quietly waited for her owner to leave to work. Then she sat on the window of their 6-th floor apartment and managed to gather a huge crowd in front of the building. No, it didn't threaten to commit suicide. It was just picking up everything from the drawers and tossing it casually on the street for several hours. Toothpaste, shirts, pantyhose, underwear... The poor woman came back home for lunch, saw the cheering crowd (and her stuff in the hands of strangers) and ran up to the apartment only to find a single jar of lotion left in the back of a drawer. Everything else was gone.
So, when I came to America I learned the phrase "monkey business". I couldn't exactly get it. To me if the monkey has some business to take care of it's serious. Very serious.
--Nikolay