Welcome Stampman1970, if I haven't said so before.
I have an idea that it has something to do with the Chinese Zodiac, the Year of the Monkey, etc.
From Wikipedia.org
http://en.wikipedia.org/wiki/Chinese_zodiacMonkey (' 🐵) " 猴 (") (Yang, 1st Trine, Fixed Element Metal): Inventor, motivator, improviser, quick-witted, inquisitive, flexible, innovative, problem solver, self-assured, sociable, artistic, polite, dignified, competitive, objective, factual, intellectual. Can be egotistical, vain, arrogant, selfish, reckless, snobbish, deceptive, manipulative, cunning, jealous, suspicious.
Also, perhaps, a guess, is that it is considered good luck for some reason. Some things are done because they bring luck or are deemed to be lucky.
Another guess, maybe the current Republic of China (correct name? I do not collect China!) was started in a Monkey year or something.
I have a vague recollection of a story about a monkey and a king, or a monkey king or emperor. I may be confusing mythologies here also.